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Jessie Oehrlein @numberdance.bsky.social · 8h

#MathsToday Implications & quantifiers in Discrete. Drawing truth sets and using those to think about implications went well, but I didn't stick the landing on connecting to contrapositive. We'll come back to it. Good start on quantifiers (using an activity from a POGIL colleague), more on Thurs!

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Jessie Oehrlein @numberdance.bsky.social · 06/10/2026

#MathsToday Kicked off a team project in Stat Analysis. This is a different structure than I've used before, so I'm nervous, and teams made very different amounts of progress today. We'll see how the descriptive analysis stage goes!

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Jessie Oehrlein @numberdance.bsky.social · 02/10/2026

I was at Alumni Weekend at my undergrad last weekend, and I am always amazed that this tiny, still-young, engineering-only school has managed to produce at least three statistics faculty. So we got a photo of all of us! Me ('16), Jerzy Wieczorek ('06), and Zach del Rosario ('14)

A woman and two men standing together in a crowded library

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Reposted by Jessie Oehrlein

Dr. Samantha Montano @samlmontano.bsky.social · 30/09/2026

By this definition emergency management has no role in mitigation and recovery and also excludes from response groups like the Red Cross, utility companies, public health, hospital/ university emergency management, etc.

Purpose: Emergency Management requires consistency and alignment with mission
requirements as well as the legal framework of existing authorities. Until now, the field has
struggled to articulate the scope of work, which has diluted our credibility, capability, and
professional development. This memorandum solidifies the definition of Emergency
Management as well as core characteristics of Emergency Management as a profession.
Background: FEMA describes Emergency Management as “the strategic coordination of
emergency services to protect life, property, and continuity of operations.” This definition
establishes a clear scope for emergency management and provides a common foundation for the
profession.
Over time, the field of emergency management has expanded well beyond its original
operational purpose, evolving to include new programs, responsibilities, priorities, and
expectations, driven in large part by the solution-oriented approach of professionals working in
crisis response. Despite this growth, operational and functional characteristics should guide what
is appropriately included within the broader emergency management mission space.

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Jessie Oehrlein @numberdance.bsky.social · 01/10/2026

My other #MathsToday note -- four of my math or data advisees came to eat snacks, talk, and play SET, and I'm so glad I have enough advisees to organize advising family events.

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Jessie Oehrlein @numberdance.bsky.social · 01/10/2026

#MathsToday I gave my Discrete students a problem set this week that was much too hard. But today, we went through them part by part, and it ended up feeling pretty good! Two parts I set aside as too much for now, but I was proud of how they reasoned through the rest with better scaffolding.

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Jessie Oehrlein @numberdance.bsky.social · 29/09/2026

#MathsToday Permutations in Discrete with a new POGIL activity from a colleague. Students gave useful feedback! Solid foundation; will need more practice. My colleague Gerry Higdon gave his 1st in a series of 6 seminars this year. Lots of excellent sequences and series! I'm excited for the rest.

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Jessie Oehrlein @numberdance.bsky.social · 28/09/2026

#MathsToday ProbStat students mdid fantastic work applying Bayes. Presentations by every student, great questions for each other. It was so fun on a day when I really needed that kind of great class.

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Hourly Cosmos @hourlycosmos.bsky.social · 26/09/2026

Seeing Jupiter - From NASA Marshall Space Flight Center - flic.kr/p/28WdFrD

This image of Jupiter's southern hemisphere was captured by NASA's Juno spacecraft on the outbound leg of a close flyby of the gas-giant planet. Citizen scientist Kevin M. Gill created this image using data from the spacecraft's JunoCam imager.

The color-enhanced image was taken at 11:31 p.m. PDT on May 23, 2018 (2:31 a.m. EDT on May 24), as the spacecraft performed its 13th close flyby of Jupiter. At the time, Juno was about 44,300 miles (71,400 kilometers) from the planet's cloud tops, above a southern latitude of 71 degrees.

JunoCam takes advantage of Juno's unique polar orbit, studying the atmospheric dynamics and clouds right up to Jupiter's poles, which no spacecraft has ever done before.

Image Credit: NASA/JPL-Caltech/SwRI/MSSS/Kevin M. Gill

Read more

NASA Media Usage Guidelines

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Jessie Oehrlein @numberdance.bsky.social · 24/09/2026

Second was color triangles. We had less time for this one, but lots of students figured out the case with 3 dots in the top row! (I'm confused by the JRMF prompts because to my knowledge "nice" solutions only exist for 4, 10, 28, etc. starting dots, but I could be wrong?)

jrmf.org

Color Triangles

Create beautiful, colorful triangular patterns.

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Jessie Oehrlein @numberdance.bsky.social · 24/09/2026

#MathsToday: A couple more explorations from Julia Robinson Math Festival in Discrete. First was colored loops! The best discussion was about how many colors loops need if the arrows all have the same number. There are other (better?) ways to get at that idea, so leaving my future self that note.

jrmf.org

Colored Loops

Create colorful loops so that you can always find your way back to the beginning of the path.

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Jessie Oehrlein @numberdance.bsky.social · 24/09/2026

Thank you! Everyone at my institution has told me not to worry, but it's still a lot!

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Jessie Oehrlein @numberdance.bsky.social · 24/09/2026

now to write a sabbatical proposal because those are due THE SAME DAY

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Jessie Oehrlein @numberdance.bsky.social · 24/09/2026

Tenure materials are all in! aaahhhh

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Jessie Oehrlein @numberdance.bsky.social · 24/09/2026

#MathsToday Bumpy in both classes -- getting used to RStudio in Stat Analysis and getting to theorems with conditional probability in ProbStat. But now we get to use Bayes on Monday! Independent study student and I took a detour and did some L(2,1) labelings for fun because graph theory is great.

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jen ramos-eisen @jenramose.online · 23/09/2026

someone's god has blessed the AL West and it sure ain't a kind one

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Ariel Edwards-Levy @aedwardslevy.bsky.social · 22/09/2026

counterpoint: it's actually good to have a systematic way of understanding what and how Americans think about politics and society outside of the periodic and limited datapoints provided by election results

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Jessie Oehrlein @numberdance.bsky.social · 22/09/2026

just bought heating oil for the first time ever 🙃 It's still very weird to me. Earlier this year, I had to ask a friend how often they got oil delivery, etc. because I had no idea how this worked.

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Jessie Oehrlein @numberdance.bsky.social · 22/09/2026

#MathsToday Leaving my future self some big "NOT THAT WAY" notes about how I introduced and & or in Discrete today, but we ended up at some good conversations about equivalent propositions anyway. And solid first steps into quantifiers (using materials from @thewordninjabk.bsky.social)

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Jessie Oehrlein @numberdance.bsky.social · 21/09/2026

#MathsToday Busy office hours (infinity, proofs, counting, and power sets across several students), first day of Principles of Data Analysis directed study, histogram Guess Who?/polygraph in Stat Analysis, and conditional probability in ProbStat!

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Hourly Cosmos @hourlycosmos.bsky.social · 18/09/2026

An Intersection of Land, Ice, Sea and Clouds - From NASA Marshall Space Flight Center - flic.kr/p/23p2SFp

As sea ice at far northern latitudes approached its annual maximum extent, the Terra satellite captured this natural-color image of sea ice and clouds off of Canada’s Newfoundland and Labrador province. Though sea ice has been significantly below normal extent and thickness across much of the Arctic, the ice in the Labrador Sea has been relatively close to normal.

In this image, acquired on Feb. 18, 2018, the coastline, the sea ice edge, and offshore clouds all present a clear edge to distinguish one from the next. Ice hugs the coast, where it receives the full chilling effect of offshore winds, and the water is shallower and fresher than in the open sea. The swirl patterns on the eastern edges reveal areas where ice is new and has not yet consolidated into a solid sheet, so it is more susceptible to stirring by winds and by ocean eddies.

Image credit: NASA/Jeff Schmaltz, LANCE/EOSDIS Rapid Response/Mike Carlowicz

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NASA Media Usage Guidelines

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Quanta Magazine @quantamagazine.org · 18/09/2026

In 2004, two mathematicians hypothesized a powerful kind of sandwich. A new proof has finally built it. www.quantamagazine.org/mathematicia...

quantamagazine.org

Mathematicians Build Long-Awaited Graph Sandwich | Quanta Magazine

The proof of a decades-old conjecture has given researchers a new way to understand complex networks.

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Jessie Oehrlein @numberdance.bsky.social · 17/09/2026

#MathsToday Eulerian paths, Handshaking Lemma, power sets, and many diagrams of sets in Discrete today! Some good conversations about all of those, but also some indications that mixing up groups next week would be useful.

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Jessie Oehrlein @numberdance.bsky.social · 17/09/2026

Have had *many* classes of applied stats students for whom the hardest part is anatomy & physiology

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Jessie Oehrlein @numberdance.bsky.social · 17/09/2026

I came *straight* to find your post after playing to see this level of satisfaction (sorry Dijon)

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Jessie Oehrlein @numberdance.bsky.social · 16/09/2026

#MathsToday Great discussion of four different graphs (of varied quality) of the same data in Stat Analysis, and first steps into using R via an activity using @annafergusson.bsky.social 's code blanks!

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Jessie Oehrlein @numberdance.bsky.social · 15/09/2026

#MathsToday Inclusion-Exclusion and Cartesian products + multiplication principle in Discrete today! PIE was really useful for review of union and intersection, and I'm so excited to be counting things.

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Jessie Oehrlein @numberdance.bsky.social · 15/09/2026

how does an LMS get so much worse in just a few months

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Jessie Oehrlein @numberdance.bsky.social · 14/09/2026

Teaching Discrete really makes me want to play Zoombinis for the first time in... probably two decades? (wrote a Pizza Pass-based problem for tomorrow)

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Jessie Oehrlein @numberdance.bsky.social · 14/09/2026

Followed roughly your Black Friday example, and students were *very* quick to have questions about the data/goal and be kind of upset by the lack of context/undefined nature of the question!

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Jessie Oehrlein @numberdance.bsky.social · 14/09/2026

#MathsToday Warming up to group work and to foundational ideas in both Stat Analysis and Probability! Some really good examples/use of examples from students in both courses today.

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Jessie Oehrlein @numberdance.bsky.social · 14/09/2026

I managed to rent in Concord (sharing w/ someone) for a reasonableish amount, but we knew there was zero chance of being able to buy in Concord because it's so absurdly expensive. Also the apartment is now listed at $450 more per month than we'd have been paying if we stayed, I think...

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Jessie Oehrlein @numberdance.bsky.social · 14/09/2026

Doing Act I/Act II of Giselle for RD/FD is *brilliant*. I'm so excited.

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Jessie Oehrlein @numberdance.bsky.social · 14/09/2026

knew exactly what #3 was going to be based on this 😂

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Jessie Oehrlein @numberdance.bsky.social · 14/09/2026

This is so lovely; thank you for sharing!

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Jessie Oehrlein @numberdance.bsky.social · 14/09/2026

I don't love choral music for rhe most part; congregational music tends to be much more meaningful to me. But this piece has stuck with me for 8 or 9 years now.

youtu.be

"No Time" arr. Susan Brumfield (SATB) performed by Rivertree Singers in Greenville, SC

YouTube video by Rivertree Singers

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Ted McCormick @tedmccormick.bsky.social · 12/09/2026

you can, if your library has books or subscriptions, have research labs for humanities courses, the way STEM courses have labs you can make communal spaces for writing you can emphasize process over productivity the choice to learn is always the student’s; that’s life. but you can make it easier

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Jessie Oehrlein @numberdance.bsky.social · 12/09/2026

"If universities want sustained engagement, they need to examine the choices their designs make rational." "We spend far less time auditing the symbolic curriculum."

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Jessie Oehrlein @numberdance.bsky.social · 11/09/2026

not as nice as cats but here are some turkeys

Six wild turkeys in a yard, at the edge of some brush and woods

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Jessie Oehrlein @numberdance.bsky.social · 11/09/2026

remember how Rybakina basically couldn't walk three weeks ago

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Jessie Oehrlein @numberdance.bsky.social · 10/09/2026

Work best friend, who is also going up for tenure this year, wrote me the best joke letter to (not) put in my tenure packet, so I wrote one for her, too. We have both printed them and will be keeping them in our offices forever.

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Jessie Oehrlein @numberdance.bsky.social · 10/09/2026

#MathsToday Spent Discrete today exploring color mazes (JRMF link below) and a grid coloring problem from Peter Kagey's list. Lots of good thoughts about strategies to find solutions, patterns, and counting. peterkagey.com/problems/061/

jrmf.org

Color Mazes

Can you jump your way from start to finish?

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Dr. Marissa Kawehi Loving @marissakawehi.bsky.social · 10/09/2026

More importantly, how can we ensure that they continue to have access to many avenues for the deep and meaningful engagement in mathematical thinking, sense making, and human-to-human collaborations that are at the heart of any mathematician’s growth?

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Jessie Oehrlein @numberdance.bsky.social · 10/09/2026

Because I can't stop following more and more sports: I had a fun time tracking The Ocean Race, and it was unreal how close it ended up being

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Michael Barany @mbarany.com · 10/09/2026

yes, but also there are real questions that should be maintained about the mathematical correctness too, there's a reason big result claims in mathematics have traditionally spawned large community efforts to understand and interrogate before the result is accepted

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Grant @syncingsinking.bsky.social · 10/09/2026

This is just to say I have solved the open questions that were in your paper and which you were probably saving for your phd students Forgive me they were delicious so incentive-laden and followed so readily once your postdoc's drafts mysteriously found their way into my training data

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Jessie Oehrlein @numberdance.bsky.social · 09/09/2026

Though I think the story of the Bharathram, Birman, and Brendle paper that's been in the news really suggests that returning to old results with new methods is something we should place a lot more value on (but the work was still driven by an open problem)

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