iiinova — where your digital self keeps evolving

Estes, John @johnestesmath.bsky.social · 15/04/2026

Tait thought all 3-conn 3-regular planar graphs were Hamiltonian, which would have proven the Four Color Theorem. Tutte provided a counterexample.

Tutte’s counterexample to Tait’s conjecture

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Estes, John @johnestesmath.bsky.social · 18/03/2025

Senor Chang's office from Community.

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Estes, John @johnestesmath.bsky.social · 07/01/2025

My son had an assignment in class where he had to turn a Christmas tree into something else. I’m such a proud father.

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Estes, John @johnestesmath.bsky.social · 25/12/2024

I’m overwhelmed. Merry Christmas!

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Estes, John @johnestesmath.bsky.social · 21/11/2024

How about this one? Chock the vertical line test failure to skewing.

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Estes, John @johnestesmath.bsky.social · 21/11/2024

I actually took this picture yesterday.

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Estes, John @johnestesmath.bsky.social · 21/11/2024

We like to print these cube puzzles to give away to visitors and alum. My lab workers decided to go big!

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Estes, John @johnestesmath.bsky.social · 20/11/2024

What function would look like this?

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Estes, John @johnestesmath.bsky.social · 13/11/2024

The Belhaven Maker Campus is repurposing recycled filament with a heated press. The sheets can be molded or cut by a laser cutter. Pretty excited about things we can do with this.

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Estes, John @johnestesmath.bsky.social · 08/11/2024

I think this is a counter example.

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Estes, John @johnestesmath.bsky.social · 05/11/2024

Max loves walks, cheese, and getting people off the couch

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Estes, John @johnestesmath.bsky.social · 01/11/2024

I'm out there, Jerry, and I'm loving every moment of it!

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Estes, John @johnestesmath.bsky.social · 30/10/2024

Our lab is asked for prints periodically. This 12" Eiffel Tower looked especially cool to me.

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Estes, John @johnestesmath.bsky.social · 23/10/2024

The basil went off! We need to use it more

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Estes, John @johnestesmath.bsky.social · 23/10/2024

The cilantro is back! It's been growing wildly for about 4 years now in my yard... tacos coming soon.

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Estes, John @johnestesmath.bsky.social · 22/10/2024

Last year, I started including a guided exercise and a practice quiz at the beginning of each homework assignment. They're not the best, but students have really liked them.

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Estes, John @johnestesmath.bsky.social · 21/10/2024

Starting today, we have a teenager in the house! Can't believe it!

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Estes, John @johnestesmath.bsky.social · 21/10/2024

Harvested some poblanos yesterday from our garden. The wife's making rajas with them this week.

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Estes, John @johnestesmath.bsky.social · 01/08/2024

Can't wait to hear students tell me they've never watched LoTR when I show this off to students this semester.

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Estes, John @johnestesmath.bsky.social · 25/07/2024

My basil has these weird growths on it. At first, I thought bugs, but they're actually roots. Cut a sprig, planted it, and it actually took. So bizarre.

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Estes, John @johnestesmath.bsky.social · 21/06/2024

Using Geogebra to recreate Archimedes' method of estimating Pi. Check twitter for animated version.

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Estes, John @johnestesmath.bsky.social · 21/06/2024

Showing Archimedes' method of finding Pi via @geogebra

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Estes, John @johnestesmath.bsky.social · 11/06/2024

Preview of my upcoming talk at the Grading Conference.

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Estes, John @johnestesmath.bsky.social · 22/05/2024

Prusa XL in assembly in process.

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Estes, John @johnestesmath.bsky.social · 02/02/2024

We got to help Belhaven's Maker Campus make plates for jewelry as a Valentine's give away this week. Students 3D printed the stamps and stencils. We're glazing next week.

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Estes, John @johnestesmath.bsky.social · 26/01/2024

Fun day of classes today. My Friday Intro to Arduino course... and playing Dos with modular arithmetic in place in Discrete.

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Estes, John @johnestesmath.bsky.social · 26/01/2024

Fun day of classes today. My Friday Intro to Arduino course... and playing Dos with modular arithmetic in place in Discrete.

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Estes, John @johnestesmath.bsky.social · 08/01/2024

Four yrs ago I bought cilantro seeds for $1. It never grew in the pots I planted them in, but it comes back every year in the yard! I clipped this bag today before yard work.

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Estes, John @johnestesmath.bsky.social · 08/01/2024

Four yrs ago I bought cilantro seeds for $1. It never grew in the pots I planted them in, but it comes back every year in the yard! I clipped this bag today before yard work today.

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Estes, John @johnestesmath.bsky.social · 06/01/2024

Max loves giving high fives and smiling about it.

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Estes, John @johnestesmath.bsky.social · 08/11/2023

Shared this in Algebra today. I believe this is accurate, but would appreciate the feedback if it's not.

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Estes, John @johnestesmath.bsky.social · 08/11/2023

Shared this in Algebra today. I believe this is accurate, but would appreciate the feedback if it's not.

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Estes, John @johnestesmath.bsky.social · 31/10/2023

My Cal 1 students proving that motion is truly an illusion.

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Estes, John @johnestesmath.bsky.social · 31/10/2023

My Cal 1 students proving that motion is truly an illusion.

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Estes, John @johnestesmath.bsky.social · 25/10/2023

One of my students voluntarily (on his own volition) led a cyber security intro workshop today. 😀 proud of the initiative and impressed with his knowledge.

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Estes, John @johnestesmath.bsky.social · 25/10/2023

One of my students voluntarily (on his own volition) led a cyber security intro workshop today. 😀 proud of the initiative and impressed with his knowledge.

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Estes, John @johnestesmath.bsky.social · 17/10/2023

Our Math Club hosted a 'Halloween Hackathon' this weekend. I procrastinated... but managed to make a few floating candles today.

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Estes, John @johnestesmath.bsky.social · 09/10/2023

Went to a wedding this weekend, and we convinced the boys to happily dress up.

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