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Johanna Franklin

@johannamath

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

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Latest posts by Johanna Franklin @johannamath

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Saturday Morning Breakfast Cereal - Signal Saturday Morning Breakfast Cereal - Signal

Or less seriously, there's the approach in this SMBC: www.smbc-comics.com/comic/signal-4

06.03.2026 13:40 πŸ‘ 4 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

When your undergraduate academic advisor congratulates you on LinkedIn on a post about your forthcoming book... πŸ₯Ή

05.03.2026 20:51 πŸ‘ 10 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

We'll have:
a PΓ³lya Lecture by Po-Shen Loh,
an Editor Lecture by Tamara Lakins,
contributed talks,
a poster session, and
student activities.

Join us!

04.03.2026 15:09 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Metropolitan New York Section of the MAA

Announcement: the Metro NY section of the MAA will be hosting its annual meeting at St. Thomas Aquinas College on 5/2! Abstract deadline 3/30, early reg 4/10. STAC is close to the NJ and Seaway sections, and we welcome our neighbors. We'll have shuttles from Metro North/NJ Transit.

#MathSky

04.03.2026 15:07 πŸ‘ 3 πŸ” 1 πŸ’¬ 1 πŸ“Œ 0

Today is St David’s Day: patron saint of Wales, of course, but also of vegetarians and poets. He was reputed to have helped introduce bees to Ireland. He is famously quoted as saying β€œGwnewch y pethau bychain”, meaning β€œDo the little things”. Small changes and good choices matter, especially now.

01.03.2026 10:13 πŸ‘ 238 πŸ” 95 πŸ’¬ 5 πŸ“Œ 2

I was a lot happier way back when every single day didn't sound like a new verse of "We Didn't Start The Fire"...

27.02.2026 12:07 πŸ‘ 197 πŸ” 50 πŸ’¬ 2 πŸ“Œ 0

Dear My University Again,

How nice; our Day of Giving is today. You say "if you’ve already given, thank you." I taught calculus for 2 hours straight starting at 8:00 a.m., gave a talk at a nearby school with your name on the title slide, & am about to work on a grant app. So: You're welcome.

~Me

26.02.2026 23:57 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

So much this.

24.02.2026 02:12 πŸ‘ 8 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

πŸ…

23.02.2026 21:41 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Congratulations! Comète thinks you're capable of growing and learning and eventually being able to feed yourself!

23.02.2026 13:55 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

And this is one reason I stopped wearing jeans. It just isn't worth figuring out which size I am in the same brand and same style year to year.

22.02.2026 03:24 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Let's try this again πŸ‘‹

Hi Bluesky - I'm Massachusetts' Attorney General. You might know me from suing President Trump nearly 50 times, beating Uber and Lyft in court, or being the first woman of color elected to statewide office in MA.

I officially left X today - help me find my MA people?

21.02.2026 16:32 πŸ‘ 13766 πŸ” 3500 πŸ’¬ 896 πŸ“Œ 188

So do I, but that doesn't mean I can read a long literary novel between, say, September and November.

Anyhow! I adored Cloud Cuckoo Land by Anthony Doerr.

21.02.2026 03:26 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Any opinions on length? This is one of the ways my book club narrows down choices: shorter reads are for the academic year, longer reads are for the summer/winter breaks.

21.02.2026 03:03 πŸ‘ 4 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

This is a great interview.

20.02.2026 20:27 πŸ‘ 1 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
Video thumbnail

In 1942, over 125,000 people of Japanese ancestry were unjustly incarcerated in America's concentration camps and deprived of their civil rights and due process. Sadly, there is an absolute parallel between what happened then and what’s happening today to immigrant communities throughout the nation.

19.02.2026 17:49 πŸ‘ 80 πŸ” 54 πŸ’¬ 1 πŸ“Œ 2

Apparently while I was asleep, part of my brain came up with:

Textbooks are read
Analysis is pleasurable
Unless you bumble into
A set that's non-measurable.

0.5*(πŸ€”+😳)

#MathSky

16.02.2026 16:09 πŸ‘ 3 πŸ” 1 πŸ’¬ 1 πŸ“Œ 0

I love this!

16.02.2026 16:30 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Drinking green tea with kawakawa on a Sunday afternoon while reading page proofs. I'm so glad I trained myself during my sabbatical that

0. when I'm drinking this particular tea, I need to be working and
1. I still have some left for times like these.

15.02.2026 20:16 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

TIL that in Old English the goose/geese tooth/teeth foot/feet alternation for plural nouns also applied to "book", so singular boc became plural bec! I am charmed.

Bring back beek!

15.02.2026 17:06 πŸ‘ 139 πŸ” 40 πŸ’¬ 1 πŸ“Œ 4

You didn't react when there were proportionally less women on conferences, papers, panels, awards, media appearances and senior positions.
Didn't use your elevated societal position to chase after misconduct allegations or hold iffy colleague accountable.

For decades.

15.02.2026 12:36 πŸ‘ 96 πŸ” 20 πŸ’¬ 1 πŸ“Œ 0

Roses are red
If uniform convergence is your quest
Try to bound all the terms
And use the Weierstrass M-test.

Roses are red
Violets are blue
I suspect that it's clear
I'm teaching Real Analysis 2.

#MathSky #ValentinesDay

14.02.2026 16:14 πŸ‘ 17 πŸ” 3 πŸ’¬ 2 πŸ“Œ 0

"I have questions about this interstellar travel form," the human said. "What should I put at 'Rose'?"

"The star system you are traveling from," xFfy said.

"I see. And at 'Violet'?"

"The one you're traveling to."

"Ah. Who translated this form?"

"Our best poets, well versed in human poetry."

14.02.2026 10:12 πŸ‘ 336 πŸ” 72 πŸ’¬ 10 πŸ“Œ 2

Congratulations! May your authors be excellent, your referees be swift, and your editorial board be responsive to e-mail.

14.02.2026 02:46 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Last of the Mohicans is my standard answer to "Name a movie that's way better than the book it was based on."

And Wuthering Heights was just so... wuthering.

13.02.2026 22:51 πŸ‘ 6 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
In a mirror: A circle in a square and a square in a circle

In a mirror: A circle in a square and a square in a circle

In a mirror: A circle in a square and a square in a circle

In a mirror: A circle in a square and a square in a circle

The 3D printed shape

The 3D printed shape

Squaring the circle

13.02.2026 21:26 πŸ‘ 15 πŸ” 2 πŸ’¬ 1 πŸ“Œ 0

Armies wear uniforms for a reason. And not just because it makes the laundry easier.

I am reminded of certain lilac blossoms on a certain Glorious 25th of May. How do you tell your comrades from your potential murderers? A carrot, a leek, a lilac sprig, a red knitted hat, a frog costume.

Duh.

08.02.2026 19:29 πŸ‘ 490 πŸ” 120 πŸ’¬ 6 πŸ“Œ 0

Decadent! I have no homemade baked goods in the house right now and I'm super jealous.

08.02.2026 22:56 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Oooh, what's under it?

08.02.2026 22:34 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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07.02.2026 22:25 πŸ‘ 16 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0