Reposted by Andrés R. Vindas MeléndezAlexander Kasprzyk @amkasprzyk.bsky.social · 30/07/2026A lovely preprint by Ben Braun et al. on Ehrhart h*-distributions. #Combinatorics #LatticePolytopes #MathSky arxiv.org/abs/2607.15886 084
Andrés R. Vindas Meléndez @arvm.bsky.social · 21/07/2026¡Hola a todos en Costa Rica! Charla pública: "La Forma de lo Posible" con Federico Ardila. No requiere conocimientos previos. ¡Además habrá música! ¿Cuándo?: 5 de agosto, 2026 | 5 PM ¿Dónde?: Universidad de Costa Rica, Sede Rodrigo Facio (Auditorio de Derecho) ¡No se lo pierdan, nos vemos allá 151
Andrés R. Vindas Meléndez @arvm.bsky.social · 11/06/2026#MathSky: Is it okay to email a copy of one of my papers to an editor of a journal to ask if they think it might be a good fit before submitting it to that journal? 220
Andrés R. Vindas Meléndez @arvm.bsky.social · 23/05/2026RIP, Richard Tapia! I recall his recounting of his mother's teachings & I hope that I can continue to live by them, just as he did: 1) Be proud; 2) Believe that you can (sí se puede); 3) Demonstrate good work habits; 4) Strive for global excellence. Richard's testimonio: shorturl.at/7KYjK #MathSky 050
Andrés R. Vindas Meléndez @arvm.bsky.social · 13/05/2026What journals do you recommend/like for publishing mathematics research with undergraduates? #MathSky 341
Reposted by Andrés R. Vindas MeléndezHarvey Mudd College @hmc.edu · 12/03/2026#HMC #ComputerScience professor Lucas Bang has received the 2025 Undergraduate Research Faculty Mentoring Award from the #CRA Education Committee for his exceptional work with undergraduate students including mentorship, research and graduate school guidance. Read more at uqr.to/lb-cra. 011
Reposted by Andrés R. Vindas MeléndezHarvey Mudd College @hmc.edu · 10/02/2026From Feb. 27–28, the #InnovationAcceleratorLab for Data Science and Social Impact will be hosting the Driving the Impact of Data Science (DIoDS) conference at #HMC. The #DIoDS conference will explore how #DataScience can be leveraged responsibly to serve society. More info at uqr.to/2627h. 031
Andrés R. Vindas Meléndez @arvm.bsky.social · 14/01/2026I got my first “I f@#*ing hate math” of the year from someone who asked what I do for a living 🙃 Happy new year! #mathsky 1100
Andrés R. Vindas Meléndez @arvm.bsky.social · 13/01/2026Join us Feb 27-28, 2026 at Harvey Mudd College (@hmc.edu) for the Driving the Impact of Data Science (DIoDS) Conference! We have a wonderful lineup of speakers! There are different ways to contribute! Registration & information in the link below. #mathsky www.hmc.edu/dssi/diods-c...hmc.eduDIoDS Conference | Data Science and Social Impact | Harvey Mudd College 062
Andrés R. Vindas Meléndez @arvm.bsky.social · 31/10/2025The Mathematical Connections Seminar is something I have started and organized since coming to Harvey Mudd. If you’re ever in the area and would love to speak at the MCS, please reach out! 084
Andrés R. Vindas Meléndez @arvm.bsky.social · 16/10/2025Combinatorics friends and math friends in/near Pittsburgh, I invite you to attend "Combinatorics at the Confluence" July 2026! #MathSky Jul 20-22, Carnegie Mellon University, Pittsburgh, PA, Combinatorics at the Confluence combcon.github.iocombcon.github.ioCombinatorics at the Confluence • July 20–22, 2026 • Carnegie Mellon UniversityConference website for Combinatorics at the Confluence, July 20–22, 2026 at Carnegie Mellon University, Pittsburgh. 094
Reposted by Andrés R. Vindas MeléndezHarvey Mudd College @hmc.edu · 06/10/2025HMC mathematics professor @arvm.bsky.social has received an NSF grant that will fund geometric combinatorics research. Vindas Meléndez & his students will collaborate on original problems, many drawn from Ehrhart theory, which studies the properties of polytopes. uqr.to/nsf-gcr. 092
Andrés R. Vindas Meléndez @arvm.bsky.social · 18/09/2025Hey, it's me :) NSF Grant Funds Geometric Combinatorics Research at @hmc.edu ! #MathSky www.hmc.edu/about/2025/0...hmc.eduNSF Grant Funds Geometric Combinatorics Research at Harvey Mudd College | Harvey Mudd College News | Harvey Mudd College 1151
Andrés R. Vindas Meléndez @arvm.bsky.social · 16/09/2025Happy to have had friends and colleagues from Harvey Mudd, Pomona College, and Cal Poly Pomona over at my house to welcome my friend, Federico Ardila, to the area! 160
Andrés R. Vindas Meléndez @arvm.bsky.social · 27/08/2025If you're in the Los Ángeles area, join us at @hmc.edu for this year's Moody Lecture on September 16! This year's speaker is my dear friend and mentor, Federico Ardila-Mantilla. For more information: www.hmc.edu/mathematics/... #mathsky 082
Reposted by Andrés R. Vindas MeléndezDarryl Yong (he/him/his) @dyong.bsky.social · 20/08/2025Friends, the mathematics department @hmc.edu is looking to hire a new tenure-track operations researcher who would feel at home in our department. Please spread the word: math.hmc.edu/tenure-track... 0910
Andrés R. Vindas Meléndez @arvm.bsky.social · 11/08/2025We are hiring in Operations Research at @hmc.edu! If you or someone you know is on the job market, please consider applying: math.hmc.edu/tenure-track...math.hmc.eduTenure Track (Operations Research) – Harvey Mudd College Mathematics 013
Andrés R. Vindas Meléndez @arvm.bsky.social · 01/08/2025Today was our last day of our research experience and I am extremely proud of my summer research students @hmc.edu! Group one (Tito Cuchilla ‘26, Joseph Hound @claremontgraduateu.bsky.social, Cole Plepel ‘27, Louis Ye ‘27) Group two (Cameron Ake ‘28, Spencer Lewis ‘28, Amanda Louie ‘28) 031
Andrés R. Vindas Meléndez @arvm.bsky.social · 28/07/2025New preprint announcement! This is my FIRST paper with @hmc.edu students and a @claremontgraduateu.bsky.social grad student! Very proud of this paper and the students who worked with me this summer. “Equivariant volumes of symmetric edge polytopes” arxiv.org/abs/2507.18846arxiv.orgEquivariant volumes of symmetric edge polytopesThe symmetric edge polytope ($\mathrm{SEP}$) of a finite simple graph $G$ is a centrally symmetric lattice polytope whose vertices are defined by the edges of the graph. Among the information encoded ... 0102
Reposted by Andrés R. Vindas MeléndezAmanda Montañez @unamandita.bsky.social · 25/07/2025ok i am aggressively not a sports person, but this story by @dodecalemma.bsky.social is so cool! and the graphics were fun to work on :) www.scientificamerican.com/article/the-...scientificamerican.comThe Surprising Math and Physics behind the 2026 World Cup Soccer BallHere’s how the new tetrahedron-based design for the “Trionda” soccer ball may affect next year’s big game 3188
Reposted by Andrés R. Vindas Meléndezꭓle Ormsby 𓆙 @e-infinity.space · 22/07/2025Squirrels LOVE octahedra. 3255
Reposted by Andrés R. Vindas MeléndezHarvey Mudd College @hmc.edu · 27/06/2025What is your favorite shape & why? For HMC math prof @arvm.bsky.social it's a permutahedron, a symmetrical, convex polytope that exhibits many special properties. Read more about Vindas Meléndez's favorite shape & the key it holds to big mathematical mysteries on @sciam.bsky.social. uqr.to/arvm-sm. 081
Reposted by Andrés R. Vindas MeléndezThiago Serra @thserra.bsky.social · 05/06/2025Yuan Zhou talks at the #mip2025 about how to estimate the solid angle of d-dimensional cones, which corresponds to the proportion of Rd occupied by them, and which does not has a known closed formula for d > 3. 1/N 182
Reposted by Andrés R. Vindas MeléndezDrew Lewis @drew-lewis.com · 05/06/2025Seems like today was a good day to be too busy to check social media during work hours 2151
Reposted by Andrés R. Vindas MeléndezJohanna Franklin @johannamath.bsky.social · 24/05/2025#MathSky there's a new online open-access (and free) journal for mathematics and fiber arts: Interlace. Now accepting manuscripts! Editors-in-Chief: sarah-marie belcastro and Carolyn Yackel. 🧶 www.interlace-journal.orginterlace-journal.org <em>Interlace</em> home pageInterlace: A Journal of Mathematics and Fiber Arts 13817
Andrés R. Vindas Meléndez @arvm.bsky.social · 04/05/2025Happy Star Wars day! May the Fourth be with you! foxtrot.com/2025/05/04/a...foxtrot.comA New Definition of PainFoxTrot by Bill Amend | May 4, 2025 010
Reposted by Andrés R. Vindas MeléndezMatthias Köppe @mkoeppe.bsky.social · 01/05/2025New release of 4ti2, the package for algebraic, geometric and combinatorial problems on linear spaces. This is a maintenance release with no new features. github.com/4ti2/4ti2/re... #FOSS #MathSkygithub.comRelease Release_1_6_11 · 4ti2/4ti2What's Changed .github/workflows/ci-sage.yml: Update, use passagemath, remove cygwin by @mkoeppe in #45 Modernize the build system / drop support for old toolchains by @orlitzky in #44 New Contr... 042
Andrés R. Vindas Meléndez @arvm.bsky.social · 23/04/2025New paper with awesome collaborators! "The Ehrhart polynomial of a matroid specializes to the beta invariant" with Anastasia Chavez (SMC), Galen Dorpalen-Barry (Texas A&M), Luis Ferroni (IAS & UniPi), Fu Liu (UC Davis), and Felipe Rincón (QMUL). #mathsky arxiv.org/abs/2504.15518arxiv.orgThe Ehrhart polynomial of a matroid specializes to the beta invariantWe show that the linear coefficient of the Ehrhart polynomial of a matroid base polytope evaluated at $t-1$ is equal to, up to normalization, the $β$-invariant of the matroid. This yields a lattice-po... 081
Reposted by Andrés R. Vindas MeléndezHarvey Mudd College @hmc.edu · 08/04/2025HMC mathematics professor @arvm.bsky.social has co-authored a paper on polynomial properties in polyhedral geometry. Read the full article about Vindas Meléndez's paper on the behavior of local h-polynomials on our news page. uqr.to/hmc-arvm. 072
Reposted by Andrés R. Vindas MeléndezHarvey Mudd College @hmc.edu · 04/04/2025Profs. @haydeelindo.bsky.social, @jamiehadd.bsky.social & Talithia Williams share the Institute for Data Science and Social Impact, which will foster interdisciplinary collaboration, advance data science research, & create pathways to apply data-informed methods to real-world issues. uqr.to/iap-dssi 0135
Reposted by Andrés R. Vindas MeléndezHarvey Mudd College @hmc.edu · 27/03/2025HMC mathematics professor @jamiehadd.bsky.social has been awarded a CAREER grant from the NSF. The grant supports Haddock's desire to be a mentor and increase access in data science for groups that have been historically excluded from research mathematics. uqr.to/haddock-career. 1134
Reposted by Andrés R. Vindas MeléndezMatt Macauley @visualalgebra.bsky.social · 22/03/2025This week, I recorded 4 new #VisualAlgebra YouTube videos on group actions. I heavily use the following concepts: 1. G-sets 2. Action graphs 3. Group switchboards 4. Fixed point tables. Interested? I'll give you a preview here. Please share! #MathSky 🧵👇1/16 48224
Reposted by Andrés R. Vindas MeléndezPeter Kagey @peterkagey.com · 15/03/2025My submission for Day 15 of @ayliean.bsky.social's #MathArtMarch: Triangle! 1164
Reposted by Andrés R. Vindas MeléndezPeter Kagey @peterkagey.com · 17/03/2025My submission for Day 17 of @ayliean.bsky.social's #MathArtMarch: Symmetry! 1163
Reposted by Andrés R. Vindas MeléndezPeter Kagey @peterkagey.com · 16/03/2025My submission for Day 16 of @ayliean.bsky.social's #MathArtMarch: Connected! 1151
Andrés R. Vindas Meléndez @arvm.bsky.social · 12/03/2025It’s me 😅 Love the math I get to do with amazing collaborators! www.hmc.edu/about/2025/0...hmc.eduVindas Meléndez Co-Authors Paper on Polynomial Properties in Polyhedral Geometry | Harvey Mudd College News | Harvey Mudd College 181
Reposted by Andrés R. Vindas MeléndezThe Women In Science Archive @wisarchive.bsky.social · 24/02/2025Today would have been the 104th birthday of Brazilian mathematician Marília Chaves Peixoto, the 1st woman in Brazil to earn a PhD in math, and a researcher into the conditions for stable fluid flow over a surface. She passed away in 1961 at the age of just 39. #WomeninSTEM #MathSky #HistSci 🧪🧮 03610
Reposted by Andrés R. Vindas MeléndezAdriana Salerno Dominguez @mathyadriana.bsky.social · 23/02/2025A dear friend wrote a thing about me. Thank you, @yarntheory.bsky.social, for this post but mostly for your friendship. ❤️ 1273
Reposted by Andrés R. Vindas MeléndezDr. U. Whitcher (U. is for Bear) @yarntheory.bsky.social · 22/02/2025My friend @mathyadriana.bsky.social lost her job last week, and I want you to know the story: buttondown.com/yarntheory/a...buttondown.comon approaching hard problemsFriends, colleagues, and lovers of words, I usually use this space to talk about books, but today I want to tell you about my friend Adriana Salerno. Like... 58657
Andrés R. Vindas Meléndez @arvm.bsky.social · 23/02/2025Me🤦🏻♂️: name’s not correct in the doc. My last names are V_ M_ & only shows M_ Tax assessor: I took name from deed 🤦🏻♂️: That has my FULL name T: *checks deed* you should’ve hyphenated. I’ll change it if you insist 🤦🏻♂️: No I shouldn’t have bc my name has NO HYPHEN. Yes I insist because I want MY NAME. 070
Reposted by Andrés R. Vindas MeléndezTrajan Hammonds @starlord37.bsky.social · 08/02/2025Last night I found out that the NSF math postdoctoral fellowship I applied for is being deleted because it does not comply with Trump’s executive orders on DEI in the federal government. I’m going to answer some FAQs and share some thoughts about this ordeal in this thread 1/n 501324490
Reposted by Andrés R. Vindas MeléndezDr. Marissa Kawehi Loving @marissakawehi.bsky.social · 08/02/2025Y’all they cancelled the NSF MPS Ascend Program after encouraging underrepresented folks to only apply to it and not both the Ascend and the MSPRF. This is astronomically fucked up for many grad students and postdocs of color in math. #MathSky 12378173
Reposted by Andrés R. Vindas MeléndezDr Abolish ICE @pwr2dppl.bsky.social · 04/02/2025Sent an email You can too #Mathsky 44713
Reposted by Andrés R. Vindas MeléndezDr. Marissa Kawehi Loving @marissakawehi.bsky.social · 01/02/2025Happy Black history month, friends! Did anyone else notice that the AMS Notices completely ignored Black history month this year and (by my count) there is only one article in the entire February issue that is even coauthored by a Black mathematician? #MathSky 02610
Andrés R. Vindas Meléndez @arvm.bsky.social · 29/01/2025No matter where I am, at home or in the classroom, I am anxious and in constant fear for my undocumented family, for my trans family, for me, my partner, and all my queer family. …then I get to my office and am also like, “can someone just tell me if I can or cannot apply to this f*$king grant?” 050
Reposted by Andrés R. Vindas MeléndezDr. Marissa Kawehi Loving @marissakawehi.bsky.social · 22/01/2025#MathSky 094
Reposted by Andrés R. Vindas MeléndezLeah Berman Williams @leahwrenn.bsky.social · 20/01/2025#mathsky 0131
