Johanna Franklin

@johannamath

Math prof at Hofstra. Logician, fan of the laws of probability & randomness, & mathematical crafter. All opinions my own. She/her/hers.

1002 Siguiendo1315 Seguidores1190 Publicaciones

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Johanna Franklin@johannamath· 11d

Two days ago, one conference ended. Yesterday, I traveled. Tomorrow, a workshop will start. But today, I have this.

A photograph of a cafe table with a café latte, a tiny glass of water, a slice of apple strudel, a small bowl of cream, and a copy of On the Calculation of Volume I on it.

Johanna Franklin@johannamath· 11d

Here's Viktória Nemkin from the Budapest University of Technology and Economics speaking about "Succinct QUBO Formulations for Permutation Problems by Sorting Networks." #wil #womeninlogic

A photograph of Viktória Nemkin behind a podium and speaking about the slide that appears behind her.

Johanna Franklin@johannamath· 11d

I'll add pictures of the other speakers as I get their permissions. Here's Margret Tembo of @swanseauni.bsky.social speaking about termination of real linear loops. #wil #womeninlogic

A photograph of Margret Tembo in front of a chalkboard, gesturing towards slides that are out of the picture on the left.

Johanna Franklin@johannamath· 11d

Then, the Women in Computability workshop. @ludolphine.bsky.social and Francesca Zaffora Blando shared their experiences about being women in this field, and the audience was wonderful. (They let me talk a bit, too.) Here we are afterwards. #wil #womeninlogic

A photo of Paula Quinon, Johanna Franklin, and Francesca Zaffora Blando standing together and smiling happily in front of a whiteboard with "CiE Trier" written on it.

Johanna Franklin@johannamath· 11d

Francesca Zaffora Blando of @cmu.edu gave a plenary on algorithmic randomness and weak merging. #wil #womeninlogic

A photograph of Francesca Zaffora Blando gesturing in front of her slides projected behind her. The slide has pictures of researchers in her field.

Johanna Franklin@johannamath· 11d

First, the CiE plenaries. I gave the first one on highness in computable structure theory with a focus on Scott rank. #wil #womeninlogic

A photograph of me (Johanna Franklin) standing next to a chalkboard looking up at a screen that is out of the picture. I'm wearing a reddish dress, and my hands are in my pockets. Don't buy dresses without pockets, people.

Johanna Franklin@johannamath· 18d

I also found this swineherd and his charges. One of them seems to have wandered off to do some window shopping.

A photograph of life-size metal statues of a swineherd and three pigs in front of a modern building. There's another statue of a pig who is peering into the building behind them.

Johanna Franklin@johannamath· 18d

Arrived in Trier for CiE 2026!

A photograph of the Porta Nigra, a Roman city gate, on an overcast day. It's made of sooty stone, and there are flower beds and palm trees in front of it.

Johanna Franklin@johannamath· 26d

Something interesting seems to have happened outside my building today...

A photo of a chalk outline of a person on a sidewalk. The person is wearing a cape or something and has long hair, and the word "criminal" is written on their chest. "Murder?" is written next to the figure.

Johanna Franklin@johannamath· 28d

Like this one?

A photograph of a very narrow and tall boringly wooden door. It appears to be the door of a supply cabinet. It has a small lock on it and a sign that says "C162C Fossilised programmers."

Johanna Franklin@johannamath· Jun 24

I've found a little cat outside our fine arts building!

A photo of a white ceramic cat with blue patches. The cat is sitting on mulch between two stands of tall grass.

Johanna Franklin@johannamath· Jun 24

I don't sit out elections, and especially not one when I could vote not just against Suozzi but for @votewelch.bsky.social. #IVoted

A photo of me in a dress with birds on it. My "I voted" sticker is stuck to it.

Johanna Franklin@johannamath· Jun 14

Hey Air NZ, I'm really excited about your new supersonic tech!

A screenshot of a leg of a flight from Auckland, New Zealand to New York. The flight departs at 7:25 pm and arrives at 7:35 pm the same day. The duration is given as 0 hours 10 minutes. This does not inspire the flyer (me) with confidence.

Johanna Franklin@johannamath· May 17

One Commencement down, one to go!

A photo of me in black academic robes and a hood. I'm mostly smiling. The robe is unzipped, and I'm wearing a navy dress under it. I'm standing in front of a tree.

Johanna Franklin@johannamath· May 14

Finals are over, and I'm hanging up the awards our majors gave me! I'm flattered. First year for Fastest Grader! #MathSky

A photo of two printed certificates. One is for "Most Likely to be The First to Calculate The Tip at a Restaurant," and the other is for "Fastest Grader."

Johanna Franklin@johannamath· May 11

The next and last class. This is what my department gets when they let one of the logicians teach the real analysis sequence.

A photo of a whiteboard with the following lines:
Null set: 0 elements.
{0}: 1 element.
...
{0,...,n-1}: n elements...
Q, N, Z: countable (aleph 0)
?????
R: uncountable (2 to the aleph 0) (all perfect sets)

Notes on the size of the power set of a finite set are off to the side.

Johanna Franklin@johannamath· May 11

Instructions for my calculus students at this morning's final that look far weirder if you don't know "AI" stands for "applications of integration" in my class. #MathSky

A photo of a whiteboard with the words "If you do not have AI problems & want them, ask me" written in black marker.

Johanna Franklin@johannamath· May 4

Anyone want to guess what we did in second semester real analysis today? #MathSky

A photo of the corner of a whiteboard with the sentence "Since infinity is not less than 3, we have a contradiction."

Johanna Franklin@johannamath· Apr 23

Look what I got today!

Johanna Franklin@johannamath· Apr 22

Yet more tulips!

A photo of multiple clumps of tulips, all with pointy petals. The ones in front are peach-red with orange-yellow tips, the ones right behind it are a reddish purple with white tips, and the rest are varying shades of bright pink.

Johanna Franklin@johannamath· Apr 16

So this is what my Calc 1 class came up with and solved this morning. There was applause at the end. #MathSky

A photo of two white boards next to each other with an indefinite integral written across both of them. It has nine terms, all of which are power functions or trig functions, and the last full
line is the answer. The classroom has bright blue walls.

Johanna Franklin@johannamath· Apr 16

More tulips!

A photo of tulips by a sidewalk. The front clump has softly orange tulips, the back clump is bright yellow-gold, and a clump with lilac colored tulips is partially visible off to the right.

Johanna Franklin@johannamath· Apr 14

The Hofstra tulips are blooming!

A photo of a cluster of tulips. Some are white and bell shaped, others are bright yellow and bell shaped, and a couple are bright yellow with pointy petals.

Johanna Franklin@johannamath· Mar 10

So a single day for pi isn't enough for my students. Yesterday they kicked off Pi Week with the ritual chalking of the quad with the digits of pi and liquid nitrogen ice cream (physics club collab). 😊

A photo of a large chalk drawing at the bottom of concrete steps. A pink lowercase pi appears inside a pie with yellow filling and an orange crust.

Johanna Franklin@johannamath· Jan 8

And we're done! Four meetings and a lot of dropoffs.

A photo of four women, two students and two professors, all from NY, standing on the street in front of the US Capitol.

Johanna Franklin@johannamath· Jan 8

At the Capitol for #MathSciOnTheHill!

A photo of me in the Senate cafeteria. I'm masked and tired but smiling and excited.

Johanna Franklin@johannamath· Jan 7

As promised, if a day late!

Johanna Franklin@johannamath· Dec 18

I walked through our art building on the way back from today's final, and my favorite class project is on display. The students are given the endpoint objects and have to sculpt them and three intermediate forms.

A sequence of sculptures in red clay. The leftmost one is a skull, and the rightmost one is a mouse sitting up on its hind legs. The three in the middle become gradually more mouse like and less skull like going left to right.

Also visible: parts of two more sequences, one starting with a Groot and the other with a Mary Jane shoe.

Johanna Franklin@johannamath· Dec 11

A new little friend came back to my office with me from the art department ceramics sale!

A photo of a small clay bird sitting on brown packing paper. The bird has a white breast and brown, detailed wings, and it's looking up quizzically.

Johanna Franklin@johannamath· Dec 1

The campus dog visited the math department today and we all got to give him scritches! 🐾