iiinova — where your digital self keeps evolving

Chris Staecker @chrisstaecker.bsky.social · 28/09/2026

Old US Navy sextant at “Mantiques” shop in the adirondacks. 10/10 did not buy

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Chris Staecker @chrisstaecker.bsky.social · 08/09/2026

RIP Mister Matt 🙁 I talked to him on the phone once- he was proud of his paper computer. I thought it was cool too.

A Youtube comment on the video for Mr Matt's Instructo Paper Computer, saying "I was a friend, he recently passed away"

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Chris Staecker @chrisstaecker.bsky.social · 02/09/2026

Spotted at an estate sale. Mathematicians may now discuss

A box of "Three Dimensional Dominoes", which are shaped like triangles

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Chris Staecker @chrisstaecker.bsky.social · 31/08/2026

Nice shiny NCR-type #mathprop in Final Fantasy 7 Rebirth

A video game screenshot of an antique cash register

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Chris Staecker @chrisstaecker.bsky.social · 22/08/2026

You are not ready for how intense this other crab gauge video is www.youtube.com/shorts/Nv_mT...

youtube.com

Custom Crab Gauges - Now Available!

YouTube video by Reel Adventures Crab Snares

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Chris Staecker @chrisstaecker.bsky.social · 21/08/2026

Silly new short: Crab gauge with clam hole 🦀 It does what you think it does. www.youtube.com/shorts/Wxr_0...

youtube.com

Crab gauge with clam hole 🦀 #crabbing #clamdigging #hole

YouTube video by Chris Staecker

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Chris Staecker @chrisstaecker.bsky.social · 20/08/2026

Just discovered Nicholas @rougeux.bsky.social 's "Mathematical Instruments" site. Wherein I finally learned how to use an old gadget that I recently found- I didn't know what it was called so I couldn't search for it, but it's there on the poster. Thanks Nicholas! www.c82.net/work/math-in...

c82.net

Mathematical Instruments

Reimagining a classic 17th century treatise

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Chris Staecker @chrisstaecker.bsky.social · 04/08/2026

dumbest-ever news article units conversion

A news article with the text "could stretch for several miles (kilometers) into space"

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Chris Staecker @chrisstaecker.bsky.social · 01/08/2026

Yard sale find: the Doodle Dome! A spherical etch-a-sketch

The doodle done, a spherical etch-a-sketch

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Chris Staecker @chrisstaecker.bsky.social · 27/07/2026

Search the Otis King calculator on YouTube shorts, and you get TONS of results stealing my footage, with @jaapsch.net 's footage in there too. I've seen this before but never at this scale! I'm lucky to get 10% of the views summa these jokers are getting. www.youtube.com/results?sear...

youtube.com

YouTube

Share your videos with friends, family, and the world

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Reposted by Chris Staecker

Chris Kohler @kohler.bsky.social · 26/07/2026

dindong enlarger

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Chris Staecker @chrisstaecker.bsky.social · 22/07/2026

New uploads to @archive.org ahead of my next video. No spoilers though! archive.org/details/@chr...

Screenshot of 4 scans of documents related to the Digi-Comp 1

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Chris Staecker @chrisstaecker.bsky.social · 19/07/2026

Emptiest-ever Sunday afternoon Home Depot ⚽️⚽️

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Chris Staecker @chrisstaecker.bsky.social · 14/07/2026

Flea market guy in Final Fantasy VII Remake has my kinda stuff

Screenshot of a guy selling at a flea market. An old cash register, balance scale, and other ambiguous old stuff

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Chris Staecker @chrisstaecker.bsky.social · 13/07/2026

Project for the rest of the summer is to finish the digital topology book I'm writing (with Dae Woong Lee). I will live-tweet every Figure I make, with no additional context. These are all made with tikz.

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Chris Staecker @chrisstaecker.bsky.social · 11/07/2026

TIL that they're the world's most fearsome fighting team, not fighting teens. Missed opportunity!

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Chris Staecker @chrisstaecker.bsky.social · 07/07/2026

Conference talk from last week for anyone interested- a forgotten theorem about the Euler characteristic! Should be understandable to anyone with some basic algebraic topology knowledge (it was an algebraic topology conference). youtu.be/mOFVAqK1lIg?...

youtu.be

A forgotten theorem about the Euler characteristic, and some fixed point theory

YouTube video by Chris Staecker

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Chris Staecker @chrisstaecker.bsky.social · 02/07/2026

Old cameras and a nice bag-o-keys for sale in Santiago de Compostela

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Chris Staecker @chrisstaecker.bsky.social · 01/07/2026

Crisp perspective in some street art in Santiago de Compostela

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Chris Staecker @chrisstaecker.bsky.social · 28/06/2026

AI menu signage is rampant where I am in Spain. Menu has words which I don’t know, next to cartoonish pictures. When I order it, turns out the thing I ordered isn’t anything like the picture… Usually still good but cmon now.

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Chris Staecker @chrisstaecker.bsky.social · 26/06/2026

K-pop the musical (versión blanca)

A poster for K-pop El Musical with no Koreans in sight

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Chris Staecker @chrisstaecker.bsky.social · 25/06/2026

Another eBay alert- a nice looking CARDIAC, the most famous of the paper computers. (I have one but wanted to cover some more obscure ones first.) Less than $100 is a good price! Though there are printable replicas online if you just want the experience. ebay.io/m/xsFlYG

ebay.io

1968 Bell Labs CARDIAC Cardboard Illustrative Aid to Computation | eBay

Unused in original envelope.

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Chris Staecker @chrisstaecker.bsky.social · 23/06/2026

New video: The Camera Lucida! Unfortunately I don't have a good idea how old my specimen is. Maybe 1950s? No ORIGINAL instructions, which might have given a hint. youtu.be/pfEdrJ50k28

youtu.be

1800s drawing gadget Camera Lucida

YouTube video by Chris Staecker

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Chris Staecker @chrisstaecker.bsky.social · 19/06/2026

CT people- my band The Noodlers is playing in downtown Fairfield this Sunday June 21. Free show 7PM outside in the pocket park by Starbucks in downtown Fairfield. 1720 Post Road. Part of Make Music Day Fairfield. Say hi if you come!

5 people standing and smiling for a picture. Apparently a very talented band.

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Chris Staecker @chrisstaecker.bsky.social · 17/06/2026

Very nice OLD brass drafting set on ebay- I've been buying a bunch of stuff lately so I'll pass, but hard to find a set like this for this cheap. Two brass protractors, several dividers and other brass stuff, AND a wooden sector rule! (the wooden box is cool too) ebay.io/m/6oT1sf

ebay.io

Antique Brass Drafting Instrument Set Wood Case Geometry Compass Engineer Tools | eBay

Drafting compasses. Suitable For: Drafting, Engineering, Architecture, Surveying. Beam compass extensions. Slide rule. Brass protractors. Material: Brass / Steel / Wood. Features: Wooden Case, Velvet Lined Tray.

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Chris Staecker @chrisstaecker.bsky.social · 12/06/2026

Got a rotating tripod head so I can finally interact with the scene while panning the camera! Will anybody notice?* New video soon! (aiming for late june) *no

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Chris Staecker @chrisstaecker.bsky.social · 11/06/2026

During journal peer review: please reply whenever you are able During editorial proofing: TAKE ACTION REPLY IMMEDIATELY OR RISK LOSING EVERYTHING

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Chris Staecker @chrisstaecker.bsky.social · 21/05/2026

Diabolical contribution from my coauthor: seven dots??? And not a single one is $\dots$. Do I need to end the collaboration? I teach my students that, in mathematical writing, there are ALWAYS EXACTLY 3 DOTS.

a screenshot of math text showing ellipses written as "......."

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Chris Staecker @chrisstaecker.bsky.social · 20/05/2026

Tiktok now provides a big button: just tap here to buy views! I've never done it, but I can see the temptation for somebody who thinks they're going to be the next big social media star.

A button in the tiktop interface saying "Spend $24 to get 21.78K views"

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Chris Staecker @chrisstaecker.bsky.social · 20/05/2026

Schools out so I made a short about this stupid thing- I like it! youtube.com/shorts/ao6SE...

youtube.com

Fidget spinner calculator case #necessary

YouTube video by Chris Staecker

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Reposted by Chris Staecker

arXiv math.GN General Topology @mathgn-bot.bsky.social · 11/05/2026

Grzegorz Graff, P. Christopher Staecker, Alan \.Zeromski: Nielsen coincidence theory of $(n,m)$-valued pairs of maps arxiv.org/abs/2605.07015 arxiv.org/pdf/2605.07015 arxiv.org/html/2605.07015

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Chris Staecker @chrisstaecker.bsky.social · 06/05/2026

intriguing scribbles on yesterday's final exam

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