## Past Presentations

Inspiring Great Classroom Discussions by Teaching with Primary Historical Sources (workshop), **Janet Heine Barnett, Abe Edwards, Dominic Klyve and Daniel E. Otero**, MathFest, Tampa, FL, August 2– 5, 2023.

Reading the Masters: A Primary Source Project Approach to Learning Analysis and Abstract Algebra, **Janet Heine Barnett**, MathFest, Tampa, FL, August 2– 5, 2023.

Nurturing Students’ Mathematical Discourse by Teaching with Primary Source Projects, **Abe Edwards**, MathFest, Tampa, FL, August 2– 5, 2023.

Historical Developments of the Laplace Transform, **Adam Parker**, MathFest, Tampa, FL, August 2– 5, 2023.

*The Moore Method, Flatland, and alternate topology axioms, ***Nick Scoville**, Innovative Pedagogy in Geometry and Topology, Oberlin College, July 11 -12, 2023.

Teaching Statistics from Primary Source Documents (Workshop), **Beverly Wood**, United States Conference on Teaching Statistics (USCOTS), College Station, PA, June 2, 2023.

*The early history of compactness and its use in pedagogical design, Naveen Somasunderam, Joint Mathematics Meetings, Boston, MA, January 3–6, 2023.*

*The early history of compactness and its use in pedagogical design, ***Naveen Somasunderam**, MAA Seaway Section Fall Meeting, Loudonville, NY, October 28–29, 2022.** **

*The French Connection: Borda, Condorcet, and the Mathematics of Voting Theory*, **Janet Heine Barnett***, *MAA Seaway Section MAA Fall Meeting, Loudonville, NY, October 28–29, 2022.** **

*Learning from History: Teaching with Primary Source Projects in Your Mathematics Classroom, ***Abe Edwards, Dominic Klyve, Danny Otero, Michael Saclolo (organizers)**, MAA Mathfest, Philadelphia, PA, August 3–6, 2022.

*Teaching Complex Analysis with Primary Source Projects (PSPs)***, David Ruch**, MAA Mathfest, Philadelphia, PA, August 3–6, 2022.

*Teaching Mathematics via Primary Historical Source Projects*, **Dominic Klyve**, MAA Northeastern Section Spring Meeting, New Haven, CT, June 3, 2022.

*Discursive transgressive actions exhibited in a History of Calculus course*, **Mark Watford**, Annual Conference on Research in Undergraduate Mathematics Education (hybrid), Boston MA, Feb 24–26, 2022.

*Modern Factorization versus Ancient Subtraction for Calculating the GCD*, **Mary Flagg**, Association for Mathematics Teacher Educators Texas Section Conference (virtual), September 18, 2021.

*Teaching Mathematics via Primary Historical Source Projects*, **Dominic Klyve**, Faculty workshop at the MAA Arkansas-Oklahoma Section Meeting, Lawton, OK, April 10, 2021.

*‘Access’ in Mathematics Education: Expanding our Perspectives with Primary Historical Sources, ***Cihan Can, Kathleen M. Clark, Mark Watford***, *American Educational Research Association Annual Meeting (virtual), April 10, 2021.

*Leveraging Primary Historical Sources for the Teaching and Learning of Undergraduate Mathematics*, **Kathleen M. Clark**, Mathematics Department Colloquium (Virtual), Florida Gulf Coast University, Fort Myers, FL, March 19, 2021.

*Using Primary Source Historical Projects in the Mathematics Classroom, ***Kenneth M. Monks, **Virtual ColoMATYC Meeting, March 5, 2021.

*Discovery through Figurate Numbers, ***Jerry Lodder, S. Fawaz Jimoh, ***Arizona Mathematical Association of Two Year Colleges [Arizmatyc] , Virtual cConference, March 5, 2021.*

*The Power, Practice, and Potential of Primary Source Projects: Transforming Instruction in Undergraduate Mathematics*, **Kathleen M. Clark**, Fifth Annual Mathematics Mini-Conference (Virtual Keynote), Florida State College at Jacksonville, Jacksonville, FL, January 29, 2021.

*Babylonian Numeration*, **Mark Koester**, Colorado Math Leaders (CML) Affiliate of the National Council of Supervisors of Mathematics (NSCM) Meeting, Denver CO, November 10, 2020.

*Promoting Students’ Mathematical Growth in Undergraduate Mathematics: Transgressions as a Lens in Qualitative Inquiry*. **Kathleen M. Clark, John M. Watford, Cihan Can, **Ethnographic and Qualitative Research Conference, Las Vegas, NV, February 25, 2020.

*Teaching Undergraduate Mathematics via Primary Source Projects, MAA Workshop,* **Diana White, Nicholas Scoville, Janet Barnett, Kathy Clark, Jerry Lodder, Dominic Klyve, Danny Otero**, Joint Mathematics Meeting, Denver CO, January 16, 2020.

*Transforming Instruction in Undergraduate Mathematics via Primary Historical Sources (poster presentation)*, **Jerry Lodder, Janet Barnett, Kathy Clark, Dominic Klyve, Danny Otero, Nicholas Scoville, Diana White**, Joint Mathematics Meeting, Denver CO, January 16, 2020.

*Connecting Algebra and Geometry through Historical Texts*, **Mark Koester**, Annual Conference of the California Mathematics Council – Northern Section, Pacific Grove CA, December 6-8, 2019.

*Using Primary Source Projects to teach undergraduate mathematics content: analysis of instructor implementation and perceptions*, **Diana White, Nicholas Carruth, Joshua Eastes, Dominic Klyve, Daniel Otero, and Nicholas A. Scoville**, Swan Delta Conference 2019, Fremantle Australia; 24 – 29 November 2019.

*The Powerfully Scintillating Pedagogy of Primary Source Projects: Reading the masters to stimulate student learning and transform your teaching. (Workshop)*, **Daniel E. Otero**, MAA Ohio Section Meeting, Portsmouth OH, October 23, 2019.

*Teaching Math with Original Historical Sources*, **Mary Flagg,** University of St. Thomas Faculty Research Colloquium, Houston TX, October 29, 2019.

*Using Primary Sources from the History of Mathematics to Engage All Students (Workshop), ***Mark Koester** and **Tayna Camargo**, National Council of Teachers of Mathematics Regional, Nashville TN,* October 2-4, 2019.*

*“In Which They Reveal to Us Only the Best of Their Thoughts”: on teaching mathematics through primary historical sources, ***Daniel E. Otero***, *Special Session on Relations Between the History and Pedagogy of Mathematics, AMS Central Section / HPM-Americas Meeting, Madison WI, September 14, 2019.

*“An entirely new phenomenon presents itself here …” Teaching and learning number theory via primary historical source, ***Janet Heine Barnett**, Special Session on Relations Between the History and Pedagogy of Mathematics, AMS Central Section / HPM-Americas Meeting, Madison WI, September 14, 2019.

*Benefits, obstacles, and transgressions, oh my! Examining the potential of primary sources to promote transgressive actions, ***Kathleen Michelle Clark***, *Special Session on Relations Between the History and Pedagogy of Mathematics, AMS Central Section / HPM-Americas Meeting, Madison WI, September 14, 2019.

*Gnomonic Explorations: A Primary Source Project in Number Theory for Mathematics Majors, Elementary Teachers and Others, ***Janet Heine Barnett, **MathFest, Cincinnati OH, August 2, 2019.

*Completing the Square with al-Khwarizmi, ***Daniel E. Otero, **MathFest, Cincinnati OH, August 2, 2019.

*Figurate Numbers from Nicomachus to Pascal, ***Jerry M. Lodder, **MathFest, Cincinnati OH, August 2, 2019.

*TRIUMPHS Graduate Student Workshop *at New Mexico State University, Las Cruces NM, D**anny Otero, Nick Scoville, Jerry Lodder, David Pengelley, Sarah Hagen, Kristina Brantley, Fawaz Jimoh, Rabah Almaaitah**, July 19-20, 2019.

*Teaching Linear Algebra with History*, **Mary Flagg, **Invited Session on Linear Algebra Education, International Linear Algebra Society (ILAS) 2019 Conference: Linear Algebra without Borders, Rio de Janeiro, Brazil, July 8-12, 2019.

*Using Primary Historical Sources to Teach Statistics*, **Beverly Wood**, Joint Statistics Meeting, Denver CO, July 30, 2019.

*TRansforming Instruction in Undergraduate Mathematics with Primary Historical Sources*, **Daniel Otero**, University of Aberdeen, Scotland, March 6, 2019.

*TRansforming Instruction in Undergraduate Mathematics with Primary Historical Sources*, **Daniel Otero**, University of Stirling, Scotland, February 27, 2019.

*TRansforming Instruction in Undergraduate Mathematics with Primary Historical Sources*, **Daniel Otero**, University of St. Andrews, Scotland, February 21, 2019.

*TRansforming Instruction in Undergraduate Mathematics with Primary Historical Sources*, **Daniel Otero**, University of Dundee, Scotland, February 11, 2019.

A Transition-to-Graduate-School Boot Camp Using Active Learning and Primary Historical Sources, **Sarah Hagens**, Joint Math Meetings, Baltimore, MD, January 2019.

*How to Read a Math Book: Reshaping Math Education Through Primary Historical Sources (Invited Keynote Address)*, **Adam Glesser**, California Mathematics Council Community Colleges Fall Conference, Monterey CA, December 8, 2018.

*Sine, Cosine, and Euler*, **Katherine Vance**, MAA Iowa Section Meeting, Sioux City IA, October 5-6, 2018.

*TRIUMPHS Training Workshop *at the University of Colorado Denver, September 13 – 15, 2018.

*The Radius of Curvature According to Christiaan Huygens*, **Jerry M. Lodder**, MathFest, Denver CO, August 4, 2018.

*Learning Mathematics through Historical Projects*, **Qin Yang**, MathFest, Denver CO, August 4, 2018.

*Implementing Primary Source Projects Using Overleaf, a Latex Platform in the Cloud*, **Kenneth M. Monks**, MathFest, Denver CO, August 4, 2018.

*Bridging the Sciences and the Humanities with Primary Historical Sources*, **Abe Edwards**, MathFest, Denver CO, August 4, 2018.

*Beyond Just Doing the Math: An Investigation of the Role of Primary Source Projects in Supporting Student Learning of the Meta-Discursive Rules of Mathematics*, **Janet Heine Barnett, Cihan Can, Kathleen Clark**, MathFest, Denver CO, August 4, 2018.

*Developing a Growth Mindset using TRIUMPHS PSPs*, **Edward Bonan-Hamada**, MathFest, Denver CO, August 4, 2018.

*Should We Call It the Abel-Dirichlet Theorem?*, **David Ruch, Joshua Gonzales, Ahern Nelson**, MathFest, Denver CO, August 3, 2018.

*Mathematical Communication: the Unexpected Benefit of Using PHSs*, **Matthew Cathey**, MathFest, Denver CO, August 3, 2018.

*Modern Algebra—A Collection of Mathematical TRIUMPHS*, **Adam Glesser**, MathFest, Denver CO, August 3, 2018.

*Pythagorean Triples: Connections Between Algebra and Geometry*, **Mark Koester**, MathFest, Denver CO, August 2, 2018.

*Instructors’ Experiences Using Primary Source Projects in Mathematics Classrooms*, **Daniel E. Otero**, MathFest, Denver CO, August 2, 2018.

*Transforming Instruction in Undergraduate Mathematics via Primary Historical Sources (poster presentation)*, **Nicholas Scoville, Dominic Klyve, Jerry Lodder, Janet Barnett, Danny Otero, Kathy Clark, Diana White**, MathFest, Denver CO, August 2, 2018.

*A Case Study of the Pedagogical Implementation of Primary Sources in Undergraduate Mathematics, ***Matt Mauntel & Kathy Clark**, European Summer University – 8, Oslo, Norway, July 24, 2018.

*Leonhard Euler’s Differentials: An Attempt to Restructure Teaching of the Derivative Concept, ***Cihan Can, Mehmet Atkas, Janet Barnett & Kathy Clark**, European Summer University – 8, Oslo, Norway, July 23, 2018.

*Old Nepali Mathematics Books in Modern Day Teaching and Learning of Mathematics, ***Deepak Baysal**, European Summer University – 8, Oslo, Norway, July 20-24, 2018.

*Engaging with Primary Sources in a Mathematics for the Liberal Arts Course, ***Marcela Chiorescu**, European Summer University – 8, Oslo, Norway, July 20-24, 2018.

*A Gaussian Tale for the Classroom: Lemniscates, Arithmetic-Geometric Means, and More*, **Janet Heine Barnett**, Canadian Society for the History and Philosophy of Mathematics, Montreal, June 4-6, 2018.

*Teaching Linear Algebra with Primary Sources*, **Mary Flagg**, Inquiry-Based Learning and Teaching in Mathematics Conference, University of Texas at Austin, May 31-June 2, 2018.

*Using Primary Source Projects to Learn Real Analysis, with Investigations from Cauchy and Abel*, **Dave Ruch**, Conference on History of Mathematics & Teaching of Mathematics, May 23-26, 2018, Miskolc, Hungary.

*The Powerfully Scintillating Pedagogy of Primary Source Projects: Reading the masters to stimulate student learning and transform your teaching. (Workshop)*, **Janet Heine Barnett**, MAA Rocky Mountain Section Meeting, Greeley CO, April 13-14, 2018.

*Using a TRIUMPHS PSP and the Growth Mindset*, **Edward Bonan-Hamada**, MAA Rocky Mountain Section Meeting, Greeley CO, April 13-14, 2018.

*Uniform and Pointwise Behavior in Cauchy’s Work*, **Dave Ruch**, MAA Rocky Mountain Section Meeting, Greeley CO, April 13-14, 2018.

*A Gaussian Tale for the Classroom: Lemniscates, Arithmetic-Geometric Means, and More*, **Janet Heine Barnett**, MAA Rocky Mountain Section Meeting, Greeley CO, April 13-14, 2018.

*The Figurate Numbers and Mathematical Induction*, **Jerry Lodder**, MAA Southwest Section Meeting, Tucson, Arizona, April 6, 2018.

*Revolutionary Mathematics: Liberating Ideas from History for Today’s Teachers and Students*, **Janet Heine Barnett**, Colorado Mathematical Association of Two Year Colleges Annual Meeting, Spring 2018 Keynote Address, 2 March 2018, Aurora Community College.

*Investigating Students’ Meta-Level Object-Reflections and Discourse-Reflections: The Provocative Power of Primary Historical Sources. (Preliminary Report.)*, **Cihan Can, Janet Heine Barnett & Kathleen M. Clark**, RUME, Feb 22 – 24, 2018, San Diego CA.

*Perspectives in the Use of Primary Sources in Undergraduate Mathematics Education: A Triangulation of Author, Instructor, and Student. (Poster.)*, **Matthew Mauntel & Kathleen M. Clark**, RUME, Feb 22 – 24, 2018, San Diego CA.

*MAA Minicourse #9: Teaching Undergraduate Mathematics via Primary Source Projects, *Joint Mathematics Meetings, January 11 and January 13, 2018, San Diego CA.

*Prime Sources: A Classroom-tested Student Project Approach to Learning Today’s Number Theory through the Works of its Historical Masters, ***Janet Heine Barnett**, Joint Mathematics Meetings, Friday January 12, 2018, San Diego CA.

*Engaging students with the Pell equation through inquiry with primary historical sources, ***Keith M Jones and Toke Lindegaard Knudsen**, Joint Mathematics Meetings, Friday January 12, San Diego CA.

*Teaching P-values from Primary Sources, ***Dominic Klyve**, Joint Mathematics Meetings, Friday, January 12, 2018, San Diego CA.

*Transforming Instruction in Undergraduate Mathematics via Primary Historical Sources (TRIUMPHS), ***Jerry Lodder, Kathleen Clark, Janet Heine Barnett, Dominic Klyve, Nicholas Scoville, Daniel Otero, Diana White**, Joint Mathematics Meetings, Thursday, January 11, 2018 San Diego CA.

*Singing sines in Sanskrit slokas, ***Deepak Basyal**, Joint Mathematics Meetings, Thursday January 11, 2018, San Diego CA.

*Determining the Determinant: learning in the footsteps of Cramer and Cauchy, ***Daniel E. Otero**, Joint Mathematics Meetings, Thursday January 11,2018, San Diego CA.

*Solving a System of Equations Using Ancient Chinese Methods, ***Mary Flagg**, Joint Mathematics Meetings, Thursday January 11, 2018, San Diego CA.

*Figurate Numbers and Mathematical Induction, ***Jerry Lodder**, Joint Mathematics Meetings, Wednesday January 10, 2018, San Diego CA.

Engaging Students with the Pell Equation Through Inquiry Using Primary Historical Sources from Medieval India, **Toke Knudsen and Keith Jones**, MAA Seaway Section Meeting, SUNY Broome Community College, Binghamton, NY, October 20–21, 2017.

*Read the masters! Learning abstract algebra via Primary Source Project*, **Janet Heine Barnett**, Midwest History of Mathematics Conference, Wabash College, Crawfordsville, Indiana, September 29 -30, 2017.

*A Course in Geometry based on Historical Sources*, **Jerry Lodder**, MathFest 2017, Session on Euclid and the Mathematics of Antiquity in the 21st Century, July 29, 2017, Chicago, IL.

*Monsters in the Classroom: Learning analysis through works of Darboux*, **Janet Heine Barnett**, MAA Rocky Mountain Section Meeting, April 21-22, 2017, Pueblo CO.

*Mean Value Theorem: History and a Primary Source Project for a Real Analysis Course*, **Dave Ruch (external author)**, MSU Denver, History of Mathematics Special Session, MAA Rocky Mountain Section Meeting, April 21-22, 2017, Pueblo CO.

*Learning Mathematics through Historical Projects*, **Qin Yang (site-tester)**, MSU Denver, Rocky Mountain Section Meeting, April 21-22, 2017, Pueblo CO.

*Workshop on Teaching Mathematics with Primary Historical Sources*, **Dominic Klyve**, MAA Intermountain Section meeting, April 8, 2017, Ogden, Utah.

*Mathematical Fights! The seedy underbelly of mathematical history*, **Dominic Klyve**, MAA Intermountain Section meeting, April 7, 2017, Ogden, Utah.

*Workshop on Teaching Mathematics with Primary Historical Sources*, **Dominic Klyve and Nick Scoville **, MAA Eastern Pennsylvania and Delaware (EpaDel) Section meeting, April 1, 2017, Kutztown, PA.

*Mathematical Fights! The seedy underbelly of mathematical history*, **Dominic Klyve**, MAA Eastern Pennsylvania and Delaware (EpaDel) Section meeting, April 1, 2017, Kutztown, PA.

*Teaching Undergraduate Mathematics Using Primary Source Projects *, **Emily Casey **, TMATYC 2017 , March 24-25 2017, Knoxville, TN.

*Primary source projects in an undergraduate mathematics classroom: A pilot case in a topology course*, **Kathleen Clark, Daniel Otero, Nicholas Scoville**, TWG 12 History in Mathematics Education session at 10th Congress of European Research in Mathematics Education (CERME 10), Dublin Ireland, February 1-5, 2017. Presentation Slides.

*Primary Sources in Every Classroom: an interactive introduction*, **Dominic Klyve**, 26th Conference of the Southern African Association for Research in Mathematics, Science and Technology Education, Bloemfontein, South Africa, January 20, 2017. Presentation Slides.

*Medieval India’s Solution to the Pell Equation as a Classroom Project, ***Toke L Knudsen and Keith M. Jones (external authors)**, Joint Mathematics Meetings, January 4-7, 2017, Atlanta, Georgia.

*Transforming Instruction in Undergraduate Mathematics via Primary Historical Sources (poster presentation),* **Dominic Klyve, Janet Barnett, Kathleen Clark, Jerry Lodder, Daniel Otero, Diana White, Nicholas Scoville**, Joint Mathematics Meetings, January 4-7, 2017, Atlanta, Georgia.

*Distance in Geometry, ***Jerry Lodder**, Joint Mathematics Meetings, January 4-7, 2017, Atlanta, Georgia.

*Preparing Students for Trigonometry with a Primary Source Project, ***Daniel E. Otero**, Joint Mathematics Meetings, January 4-7, 2017, Atlanta, Georgia.

*Collaborative Research: Transforming Instruction in Undergraduate Mathematics via Primary Historical Sources (TRIUMPHS), ***Nicholas A Scoville**, Joint Mathematics Meetings, January 4-7, 2017, Atlanta, Georgia. Presentation Slides.

*Read the masters! Learning abstract algebra via Primary Source Projects, ***Janet Heine Barnett**, Joint Mathematics Meetings, January 4-7, 2017, Atlanta, Georgia.

*Drinking straight from the source: Learning today’s mathematics through its historical roots, ***Janet Heine Barnett**, Joint Mathematics Meetings, January 4-7, 2017, Atlanta, Georgia.

*Teaching Undergraduates (Trigonometry) with Primary Historical Sources*, **Danny Otero**, Ohio State Math Education Forum, Columbus OH, November 18 2016.

*Teaching Undergraduate Mathematics Using Primary Source Projects*, **Janet Heine Barnett and Diana White**, Workshop at American Mathematical Association of Two Year Colleges (AMAYTC), Denver CO, November 17 – 20, 2016.

*Mathematical Fights! The seedy underbelly of mathematical history*, **Dominic Klyve**, Saint Mary’s College of Maryland, November 15, St. Mary’s City, Maryland.

*Mathematical Fights! The seedy underbelly of mathematical history*, **Dominic Klyve**, University of North Carolina Greensboro Undergraduate Research Confernce, November 12, Greensboro, North Carolina.

*Mathematical Fights! The seedy underbelly of mathematical history*, **Dominic Klyve**, Elon University Mathematics Recruitment dinner, November 10, Elon, North Carolina.

*Mathematical Fights! The seedy underbelly of mathematical history*, **Dominic Klyve**, Catawba College, November 10, Salisbury, North Carolina.

*The TRIUMPHS project: Opportunities for history, research, and change in undergraduate mathematics classrooms.*, **K. Clark & C. Can, **, Presentation at Fall Meeting, History and Pedagogy of Mathematics – Americas Section, SanDiego, CA, October 2016. Presentation Slides.

*TRIUMPHS Training Workshop *at the University of Colorado Denver, September 8 – 10, 2016. Photos available here.

*Primary Historical Sources in the Classroom: Graph Theory and Spanning Trees*, **Jerry Lodder**, International Congress on Mathematical Education (ICME-13), Topic Study Group lecture, July 26, 2016, Hamburg, Germany.

*Connecting past to present: an approach to teaching topology and more via original sources*, **Nicholas A Scoville, Janet Heine Barnett, Kathy Clark, Danny Otero, and Diana White**, The HPM Satellite Meeting of ICME-13 (International Conference on Mathematical Education), July 18-22 2016, Montpellier, France.

*Monsters in the Mathematics Classroom: Learning analysis through the works of Gaston Darboux*, **Janet Heine Barnett**, The HPM Satellite Meeting of ICME-13 (International Conference on Mathematical Education), July 18-22 2016, Montpellier, France.

*Is the disjunctive form really normal? Teaching boolean algebra via original sources,* **Janet Heine Barnett**, Canadian Society for History and Philosophy of Mathematics Annual Meeting, Calgary Alberta (Canada), May 29 – 31, 2016.

*Dedekind’s Ideals: Prime Mathematics for Today’s Students,* **Janet Heine Barnett**, History of Mathematics Special Session, MAA Joint Intermountain and Rocky Mountain Sections Meeting, Grand Junction CO, April 8-9, 2016.

*History as Travel Guide and Companion: Mathematical Itineraries to Excite, Educate and Entertain,* **Janet Heine Barnett**, Burton W. Jones Distinguished Teaching Award Invited Talk, MAA Joint Intermountain and Rocky Mountain Sections Meeting, Grand Junction CO, April 8-9, 2016.

*Teaching with historical curricular modules: The juxtaposition of Prufer and Boruvka, ***Jerry Lodder**, Joint Mathematics Meetings, January 6-9, 2016, Seattle, Washington.

*Greek Chords and Hindu Sines: teaching trigonometry with original sources, ***Daniel E. Otero**, Joint Mathematics Meetings, January 6-9, 2016, Seattle, Washington.

*The Cantor Set before Cantor, ***Nicholas A Scoville**, Joint Mathematics Meetings, January 6-9, 2016, Seattle, Washington. Presentation Slides.

*Transforming Instruction in Undergraduate Mathematics via Primary Historical Sources (poster presentation),* **Dominic Klyve, Janet Barnett, Kathleen Clark, Jerry Lodder, Daniel Otero, Diana White, Nicholas Scoville**, Joint Mathematics Meetings, January 6-9, 2016, Seattle, Washington.

*Primary Sources in Every Classroom: an interactive introduction*, **Dominic Klyve**, Tendencias en la educación matemática basada en investigación (TEMBI) (Trends in Research-based Mathematics Education), November 5-8, 2016, Puebla, Mexico.