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Reposted by Andrés R. Vindas Meléndez

Harvey Mudd College @hmc.edu · 5d

HMC 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.

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Andrés R. Vindas Meléndez @arvm.bsky.social · 22d

Thank you! :)

Andrés R. Vindas Meléndez @arvm.bsky.social · 23d

Hey, it's me :)

NSF Grant Funds Geometric Combinatorics Research at @hmc.edu ! #MathSky

www.hmc.edu/about/2025/0...

NSF Grant Funds Geometric Combinatorics Research at Harvey Mudd College | Harvey Mudd College News | Harvey Mudd College

www.hmc.edu

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Andrés R. Vindas Meléndez @arvm.bsky.social · 26d

Happy 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!

Group of mathematicians and friends taking selfie.

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Andrés R. Vindas Meléndez @arvm.bsky.social · Aug 27

If 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

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Reposted by Andrés R. Vindas Meléndez

Darryl Yong (he/him/his) @dyong.bsky.social · Aug 20

Friends, 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...

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Andrés R. Vindas Meléndez @arvm.bsky.social · Aug 11

We 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...

Tenure Track (Operations Research) – Harvey Mudd College Mathematics

math.hmc.edu

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Andrés R. Vindas Meléndez @arvm.bsky.social · Aug 1

Today 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)

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Andrés R. Vindas Meléndez @arvm.bsky.social · Jul 28

New 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/2507.18846

Equivariant volumes of symmetric edge polytopes

The 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 ...

arxiv.org

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Reposted by Andrés R. Vindas Meléndez

Amanda Montañez @unamandita.bsky.social · Jul 25

ok 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-...

The Surprising Math and Physics behind the 2026 World Cup Soccer Ball

Here’s how the new tetrahedron-based design for the “Trionda” soccer ball may affect next year’s big game

www.scientificamerican.com

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Reposted by Andrés R. Vindas Meléndez

χle Ormsby @motivickyle.bsky.social · Jul 22

Squirrels LOVE octahedra.

16th century watercolor of octahedron balanced on a point with squirrel nearby.

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Reposted by Andrés R. Vindas Meléndez

Harvey Mudd College @hmc.edu · Jun 26

What 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.

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Reposted by Andrés R. Vindas Meléndez

Thiago Serra @thserra.bsky.social · Jun 5

Yuan 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

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Drew Lewis @drew-lewis.com · Jun 5

Seems like today was a good day to be too busy to check social media during work hours

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Reposted by Andrés R. Vindas Meléndez

Johanna Franklin @johannamath.bsky.social · May 24

#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.org

<em>Interlace</em> home page

Interlace: A Journal of Mathematics and Fiber Arts

www.interlace-journal.org

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Andrés R. Vindas Meléndez @arvm.bsky.social · May 4

Happy Star Wars day! May the Fourth be with you!
foxtrot.com/2025/05/04/a...

A New Definition of Pain

FoxTrot by Bill Amend | May 4, 2025

foxtrot.com

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Andrés R. Vindas Meléndez @arvm.bsky.social · May 3

No, only in captivity.

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Reposted by Andrés R. Vindas Meléndez

Matthias Köppe @mkoeppe.bsky.social · Apr 30

New 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 #MathSky

Release Release_1_6_11 · 4ti2/4ti2

What'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...

github.com

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Andrés R. Vindas Meléndez @arvm.bsky.social · Apr 23

New 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/2504.15518

The Ehrhart polynomial of a matroid specializes to the beta invariant

We 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...

arxiv.org

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Reposted by Andrés R. Vindas Meléndez

Harvey Mudd College @hmc.edu · Apr 8

HMC 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.

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Reposted by Andrés R. Vindas Meléndez

Harvey Mudd College @hmc.edu · Apr 4

Profs. @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

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Reposted by Andrés R. Vindas Meléndez

Harvey Mudd College @hmc.edu · Mar 27

HMC 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.

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Reposted by Andrés R. Vindas Meléndez

Matt Macauley @visualalgebra.bsky.social · Mar 22

This 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

Three actions of D₄: on itself by multiplication, on itself by conjugation, and on its subgroups by conjugation. Action graphs of each are shown.

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Reposted by Andrés R. Vindas Meléndez

Peter Kagey @peterkagey.com · Mar 15

My submission for Day 15 of
@ayliean.bsky.social's #MathArtMarch: Triangle!

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Reposted by Andrés R. Vindas Meléndez

Peter Kagey @peterkagey.com · Mar 17

My submission for Day 17 of
@ayliean.bsky.social's #MathArtMarch: Symmetry!

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