Lmst

Happy #ShamelessPlug Day!

Finding myself in need of #PiDay apparel ("ap-π-rel"?) for an event or two, I've added a couple of pi-related t-shirt designs to my Etsy shop: http://inspiredbymath.etsy.com

• "Approximately Pi" demonstrates the near-equality of π and √2+√3 (that is, 3.1415… vs 1.4142…+1.7320…=3.1462…). Note that √2 and √3 appear courtesy of our old friends the 45°-45°-90° and 30°-60°-90° triangles.

• "Powers-of-Pi Pinwheel" features a sequence of iterated involutes of a unit semicircle, each with length π^n/n! . It's the special case (t=π) of Y. S. Chaikovsky's delightful visualization of the power series for sin(t) and cos(t). (Fun Fact: Long ago, I adapted Chaikovsky's construction to tan(t) and sec(t), but cot(t) and csc(t) still remain elusive. https://trigonography.com/?p=881 )

These join two pi-and-tau designs.

"Approximately Pi" t-shirt design, illustrating the near-equality of pi and the sum of the square root of two and the square root of three

"Powers-of-Pi Pinwheel" t-shirt design, showing iterated involutes of the unit semi-circle, each having length of pi-to-the-nth power, divided by n-factorial

"Pi & Tau COEXIST" t-shirt design, with pi and tau representing the unit circle's area and circumference, respectively

"Tau & Pi Mnemonic" shows how to associate tau (with its SINGLE stem) with the ONE-dimensional circumference of the unit circle, and pi (with its DOUBLE stem) with the TWO-dimensional area

#WritersCoffeeClub Jan. 14: What’s a service or skill you’d like to offer your fellow writers?

Like, personally? Right now? You're expecting something completely out of the blue?

Well, lucky you, my skill is programming and I make apps! Take your pick! I have MediaAlarm and EggTimer for all your alarm needs, and an assortment of useful tools for everything from time tracking with RainbowTimers to running your tabletop game with Dice and Random NEXT to posting your fanfic more easily with RTF2BBCode!

All of this is currently going for the fabulously low price of "FREE," which I think is everyone's favorite four-letter word you can still shout in a daycare!

#ShamelessPlug

@zzt @firefoxwebdevs Sorry, but I just cannot escape the call for #ShamelessPlug (though, as usual, #IHaveNothingToSell):

https://mastodon.art/@aaribaud/110721997413550131

Mathy 2026! #MathyDay

(It's not an "i", it's an upside-down "!" for "inverse factorial"!)

#ShamelessPlug: T-shirt (listing lots of mathy days throughout the year) available at my Etsy shop: https://inspiredbymath.etsy.com

12.13.25: Happy Plus-Equals Day! #MathyDay

I'll take the opportunity to slip-in another #ShamelessPlug for my Mathy 2026 t-shirt, available at my Etsy shop: https://inspiredbymath.etsy.com

Happy Plus-Equals Day! 12 plus 13 equals 25

“Common People”!!!! You can hear Raina talk about this pick and the rest of her ballot on the livestream we had last night! #XPNcountdown #shamelessplug

RE: https://bsky.app/profile/did:plc:6x7zqldbl3qvjsj2fgwjgwuz/post/3m7pmidqw7222

#shamelessplug

Happy #ShamelessPlug Day!

I've added "Mathy 2026" t-shirts to my Etsy shop, just in time for holiday shopping ... and shipping!

https://inspiredbymath.etsy.com

The front features the digits of 2026 incorporated into an equation (oh-so-cleverly using an upside-down exclamation point to indicate the inverse-factorial function). The back lists over forty mathy dates (in MDY format ... sorry DMY-ers!).

Buy one of these, and you can ignore my #MathyDay posts for a full year.

Thanks for your support! :)

Mathy 2026 shirt back, listing lots of mathy dates throughout the year

#ShamelessPlug Over the last few weeks, a few folks have asked me via DM what I do for a living, apart from my daily photo blog posts over here, so I thought, for my 300th post, I'd try to describe briefly what I have been working on… Coincidentally, we just celebrated our 2nd year anniversary on November 15th 🎉🥳🍾

Here it goes:

At http://asynco.org, we’re a community of people, i.e. a collective, who care about how we work and connect, especially, in asynchronous and distributed environments. If you’re looking for genuine exchange and thoughtful company in a safe and trustworthy environment, there’s a place for you with us, whenever you’re ready to join the conversation. Just get in touch and we’ll talk more 😎👍🏻

#DistanceWorking #RemoteWork #HybridWork #DistributedWork #cmgr #asynco #Learning #Collaboration #CommunityOfPractice #DistributedLeadership #SocialNetworks #SocialNetworking #SmartWork

Happy #ShamelessPlug Day!

For when My Dear Aunt Sally enlists in Starfleet.

via my Etsy shop: https://inspiredbymath.etsy.com

Closeup of a blue t-shirt featuring the insignia of the Addition, Subtraction, and Multiplication Division

Male and female models wearing red t-shirts featuring the insignia of the Addition, Subtraction, and Multiplication Division

Closeup of a black t-shirt featuring the insignia of the Addition, Subtraction, and Multiplication Division

I’m Not on Bluesky, but the Blog Is

I’m told that Ancient World Twitter was a thing and many of the same people have moved to Bluesky. I am an open web person not a corporate social media person, but if you prefer following this site on Bluesky to following it on RSS or by email or on Mastodon or by checking the URL every few days, there is a way. For a few months, it has been possible to follow bookandswordblog at https://bsky.app/profile/bookandswordblog.scholar.social.ap.brid.gy

I am not there! I am unlikely to see any likes or replies. I think all corporate social media funded by other people’s money will follow the same path as Facebook and Reddit and birdsite. I wonder if in a thousand years people will talk about microblogging like the Romans talked about the time they invited the Goths across the Danube then started to shake them down and enslave them without calling in the army first (or maybe like the Athenians talked about how they realized that speaking persuasively was a skill that could be taught for money). But if you want to follow this site on Bluesky, that is possible.

(scheduled 12 October 2025)

#mediaCriticism #modern #shamelessPlug #socialMedia

a screenshot of the Blueksky interface in light mode, a one-column layout with an icon, follow button, handles, and short bio against a white background

https://fogwave.printify.me/product/24023692/la-izquierda-libera-unisex-stonewash-tank-top ✊ #nokings #shamelessplug

Model wearing a stonewashed black muscle tank with "La derecha oprime / la izquierda libera" on it with a screw on its side with each of the threads in pride flag colors

Happy #ShamelessPlug Day!

Just a note that, if you like my triggy math-o-lantern t-shirt, then you might want to order one in the next day or two for delivery by Halloween. (In my experience, delivery takes about a week, but holiday shipping could cause delays.)

https://inspiredbymath.etsy.com

Thanks for your support! :)

Happy #ShamelessPlug Day!

I've added a triggy Halloween t-shirt to my Etsy shop. The design features a jack-o-lantern (math-o-lantern?) with iconic 30°-60°-90° and 45°-45°-90° right triangle eyes (with sides in proportion 1:√3:2 and 1:1:√2, of course), an equilateral triangle nose (1:1:1), and a sinusoidal grin (or grimace).

While I'm at it, I'll mention my design for fans of the Oxford/Harvard/serial comma. Pi-Tau COEXIST, Kangleroo, and other options also available.

https://inspiredbymath.etsy.com

Thanks for your support! (This is my only source of income at the moment.)

T-shirt with a "Trig = Treat!" Halloween design with a trigonometric jack-o-lantern design.

Detail of the "Trig = Treat" jack-o-lantern design, with 30-60-90 and 45-45-90 right triangle eyes, an equilateral triangle nose, and a sinusoidal mouth.

T-shirt advocating use of the Oxford/Harvard/serial comma, The design simply shows two commas, an ampersand, and an exclamation point for emphasis.

#pullrequest sent.

In other news, there's no tool quite like #Emacs #orgmode for gathering data from multiple sources in multiple formats and massaging it into an #estimate of effort for migrating a capability from one #vendor to another. #shamelessplug

Stitch Witches!

Halloween is coming and I thought I'd share these patterns which I think are pretty neat. Using glow in the dark threads they reveal themselves after lights out.

#ShamelessPlug

https://thesteadythread.com/collections/halloween/products/crystal-ball

https://thesteadythread.com/collections/halloween/products/halloween-blackwork-blackwork-ghost-pattern-pdf-modern-blackwork-embroidery

Photograph of a Blackwork embroidery pattern depicting a classic sheet ghost. A second, smaller picture of the same pattern reveals it's spooky green glow in the dark self.

Photograph of a Blackwork embroidery pattern depicting two hands around A crystal ball with twinkling stars above. Nothing can be seen in the crystal ball. Yet...

Photograph of a Blackwork embroidery pattern depicting two hands around A crystal ball with twinkling stars above. The lighting is low yo reveal a hidden glow in the dark sheet ghost within the ball. The stars also glow spooky green.

When the author regrets making that one character for the plot and now they’ve had enough 📖

Also, surprise plug! I have a brand new website with a blog I’ve been posting on for the last week:

https://thornwoodonline.wordpress.com

Head on over there to hear me ramble some more at the Bored Stiff Blog!
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#BookTok #writertok #blog #website #sketch #shamelessplug #characters

NULL Train demo is now available for Linux and SteamOS 🎉 Play the demo. Wishlist it: https://store.steampowered.com/app/3717840/NULL_Train/

#gamedev #gameplay #gameplayshorts #nulltrain #indiedevs #indiegamedev #steamgame #gamedemo #pixelart #wishlistideas #wishlist #roguelike #madeinhawaii #steamdeck #steamos #linux #shamelessplug

This is the second time I featured Raye on a playlist. The first time was last December’s jazz themed #ILikeToWatch playlist. She’s so gosh darned cute! 🥰

#ShamelessPlug
https://youtube.com/playlist?list=PLGkQ2CMSV2Yuq_3zWm65JPNngYzWwb5ba&si=1apj_XYyaKqS5Lu6

Yes, The Book of PF, 4th Edition Is Coming Soon https://nxdomain.no/~peter/yes_the_book_of_pf_4th_ed_is_coming.html (also tracked https://bsdly.blogspot.com/2025/07/yes-book-of-pf-4th-edition-is-coming.html) #openbsd #freebsd #bookofpf #pf #packetfilter #book #networking #security #freesoftware #libresoftware #shamelessplug @nostarch

#shamelessplug

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