Parker Adey

About the Office Camera

Fri, 18 Nov 2022 09:35:05 -0500

There is a webcam in my office that I use to take photos of the whiteboard. This setup was inspired by Dror Bar Natan’s Blackboard Shots. If you know of anyone else with a similar setup, please let me know.

Added Pagefind

Thu, 04 Jun 2026 20:58:48 -0400

A reader asked for a search feature!

Commutator Intuition

Tue, 02 Jun 2026 15:51:01 -0400

What is a commutator, really?

Week Notes 59: Beets, Cubes, Dossier, and CMESG

Tue, 02 Jun 2026 19:00:00 +0700

A trip to Kingston for CMESG.

CMESG 2026 Pack List

Fri, 29 May 2026 11:56:59 -0400

All the stuff that I brought to CMESG 2026

Of Loops, Braids, and String Figures: The Loopy Calculus of Cat's Cradle

Wed, 27 May 2026 10:37:06 -0400

The hands out and slides for a talk at Bridges 2026.

Week Notes 58

Tue, 26 May 2026 19:00:00 +0700

An Esperanto trip, tk

Dividing Derivatives of Multivariate Functions: Cannot Divide

Mon, 25 May 2026 16:09:21 -0400

Dividing Derivatives of Multivariate Functions: Can Divide

Mon, 25 May 2026 16:06:59 -0400

How to Build Spot It

Mon, 25 May 2026 09:01:02 -0400

A bit of projective geometry builds a Spot It deck or the Fano plane.

Build Spot It (Part 5)

Mon, 25 May 2026 08:58:42 -0400

Build Spot It (Part 4)

Mon, 25 May 2026 08:54:08 -0400

Build Spot It (Part 3)

Mon, 25 May 2026 08:46:09 -0400

Build Spot It (Part 2)

Mon, 25 May 2026 08:43:35 -0400

Build Spot-It / Dobble (Part 1)

Mon, 25 May 2026 08:36:18 -0400

Digital Magic: An Introduction to Base Systems

Fri, 22 May 2026 16:12:28 -0400

An old magic trick is used to introduce binary.

Missing Symbols PDF

Wed, 20 May 2026 10:27:26 -0400

Attention conservation notice: This is a fix for a very niche problem. Unless your printer is eating certain character from your print job, you had best move on. The punchline is: flatten the PDF.

The printer at work, a Ricoh IM C6500, doesn’t get along well with me. Sometimes, when printing a PDF it will garble the output and omit a lot of symbols. It drops math symbols and particular kernings, in particular ff. This makes it di icult to read papers.

Tricky ProSet Layout Part 2

Thu, 14 May 2026 09:48:37 -0400

Tricky ProSet Layout Part 1

Thu, 14 May 2026 09:39:00 -0400

Week Notes 57

Wed, 13 May 2026 19:00:00 +0700

The 4th week of summer.