David J. Gillcrist
@davidjgillcrist.com
580 followers 280 following 250 posts
Mathematician • PhD Candidate • Science Educator • Unabashedly Confused Person • Dad Website: davidjgillcrist.com I research differential geometry-informed optimal experimental design Banner: Rings of dry ice vapor trapped by acoustic radiation force
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davidjgillcrist.com
I'd like everyone on #MathSky to know that I recently got published in the Journal of Machine Learning for Modeling and Computing! 🎉🎉🎉

The article is titled Design of Experiments via Multi-Fidelity Surrogates and Statistical Sensitivity Measures, found here: www.dl.begellhouse.com/journals/558...
DESIGN OF EXPERIMENTS VIA MULTI-FIDELITY SURROGATES AND STATISTICAL SENSITIVITY MEASURES
Abramowitz, M. and Stegun, I.A., Orthogonal Polynomials, Applied Math Series, Washington, DC: U.S. Dept. of Commerce, National Bureau of Standards, 1972.
www.dl.begellhouse.com
davidjgillcrist.com
Moral of the story: if you catch someone saying "Trump has a 'majority' mandate," you can just tell them this. Okay. I promise I'm done now 😁
davidjgillcrist.com
Also, to correct/specifiy my own math. If the tally error rate is applied only to the remaining, non-Trump votes you get ≈49.801%, but if you apply the rate to all the votes cast but miraculously say none of those are in Trump's votes you get ≈49.806%. Regardless, the point's still the same 😅
davidjgillcrist.com
more than 50% of votes cast. A majority voted for someone else. Perhaps this individual was missing sufficient information on how to interpret properly what winning the majority of the electoral college votes means. But, either way, a "majority" mandate, Trump has not. (4/4)
davidjgillcrist.com
the stops for Trump, he still lands with merely a plurality of votes. A large plurality albeit, but only a plurality nonetheless. He may have done better in this election than either of the previous two he ran in, but that doesn't make him something he's not, that being a candidate who won (3/4)
davidjgillcrist.com
i.e. 1 out of every 10,000 votes counted is inaccurate, and say all those inaccuracies are in Trump's favor, that raises his total count to 77,310,374, putting his percentage at ≈49.801%. Assuming we're defining "majority" reasonably as winning 50%+1 of votes cast, even when pulling out all (2/4)
davidjgillcrist.com
It's also funny because, according to the FEC's Official 2024 Presidential General Election Results, the total number of votes cast was 155,238,302; 77,302,580 of which were for Trump. Meaning he received ≈49.796% of the popular vote. Even if we use an exceptionally large tally error of 0.01%, (1/4)
www.fec.gov
davidjgillcrist.com
Sooo, when are we gonna get a collaboration between Noah Kahan and Canada's Noah Kahan (i.e. Cameron Whitecomb)? #Canada #Music #CanadianMusic
Reposted by David J. Gillcrist
wisarchive.bsky.social
Wishing a happy 83rd birthday to NASA mathematician and researcher Christine Darden, who specialized in the analysis of supersonic noise and research into its reduction. She was the first Black woman at NASA to reach Senior Executive Service status.

#WomenInSTEM #NASA #MathSky 🧪🚀
Reposted by David J. Gillcrist
fancycomma.bsky.social
We published this on the @fancycomma.bsky.social blog and it feels very true right now, as it has always been, in my experience. Read: fancycomma.com/2025/06/07/f... #SciComm #SciPol
Reposted by David J. Gillcrist
diffgeom.com
Poster images at Differential Geometry usually have underlying pedagogical content. This month I've been working on prospective poster designs that are mathematical but not necessarily pedagogical.

www.diffgeom.com/product-cate...

#MathSky #MathArt #ITeachMath
A white wire mesh conformal torus floats above a reflective surface in a double gradient from mint green to cyan left to right and light to dark from top to bottom, casting a black shadow.
davidjgillcrist.com
Hmmm 🤔, do mathematicians count?
davidjgillcrist.com
I forget where I originally saw this, but it's one of my absolute favorite memes. #MathSky #iTeachMath #MathMemes #ScienceMemes
davidjgillcrist.com
This meme probably best describes my research life for the past three months. #MathSky #Science #MATLAB
Reposted by David J. Gillcrist
goacpr.org
🎻 96% of all classical music is heard on public radio. If Congress approves a proposal to strip public radio funding, on-air classical music would virtually cease to exist in the United States.

Take action today to #SavePublicRadio and the music you love at goACPR.org
Reposted by David J. Gillcrist
noamross.net
UPDATE: We have data on >1000 terminated #NSF grants at grant-watch.us. Thanks to all who have been contributing data the past few days.

We've also added a "Reports" section with some analyses. For NSF, we see that the STEM education directorate has been absolutely pummeled.
Screenshot of table showing number of grants and total value terminated by NSF directorate. STEM Education directorate is highlighted, with 417 terminations totaling 322 million dollars.

CSV of table:
Directorate,No. Terminated,Total Value
Biological Sciences,46,"$27,960,075"
Computer and Information Science and Engineering,85,"$44,630,113"
Engineering,94,"$33,472,485"
Geosciences,52,"$36,454,740"
Mathematical and Physical Sciences,30,"$6,418,312"
Office of the Director,7,"$4,859,738"
STEM Education,417,"$322,680,063"
"Social, Behavioral and Economic Sciences",266,"$77,635,904"
"Technology, Innovation and Partnerships",46,"$62,231,309"
davidjgillcrist.com
Then they came for the Jews
And I did not speak out
Because I was not a Jew
Then they came for me
And there was no one left
To speak out for me"
– Martin Niemöller, Lutheran Pastor, Holocaust Survivor
(5/5)
davidjgillcrist.com
with it.

"First they came for the Communists
And I did not speak out
Because I was not a Communist
Then they came for the Socialists
And I did not speak out
Because I was not a Socialist
Then they came for the trade unionists
And I did not speak out
Because I was not a trade unionist

(4/5)
davidjgillcrist.com
faced the utmost scrutiny of the people that elected them. Call your local, state, and federal representatives and put all the pressure you can muster on them to stand against the zealous grab of power we're witnessing . People that do not live with virtue should never be expected to govern… (3/5)
davidjgillcrist.com
baselessly as the outcome of a mother's choice who was swiftly and forcefully ejected out of this nation is one of the sorriest excuses for a deplorable act of this regime. Governments, regardless of the parties that steer them, are never owed the benefit of the doubt, and should ALWAYS be… (2/5)
davidjgillcrist.com
There is no singular article that reflects the autocracy—and the rampant violations of the core rights and principles that go along with it—happening right now in the United States. However, stripping children away from a country they have a constitutional right to be in, and justifying it… (1/5)
U.S. judge says 2-year-old apparently deported to Honduras 'with no meaningful process'
The toddler, a U.S. citizen, was apparently sent to Honduras with her mother and 11-year-old sister, even as a federal judge tried to contact an attorney representing the government.
www.npr.org
davidjgillcrist.com
I internalize posts like this as subtly encouraging us to not dispair and be optimistic about the future. Sometimes a calm meditative moment is enough to promote a proactive attitude for positive change. I for one WILL watch some birds this weekend. 😊 #Science 🌍🌎🌏
instbirdpop.bsky.social
🪶🌎🧪 Try to take a break and watch some birds this weekend.
Photo of a Golden-crowned Kinglet hanging upside-down from a branch by Jen Goellnitz. Text on the photo says: "Hang in there. Love your friends at The Institute for Bird Populations."
Reposted by David J. Gillcrist
samschuelstein.bsky.social
"Get up offa that thing,
And shake 'till you feel better,
Get up offa that thing,
And try to release that pressure!"

In other words, JOIN the #standupforscience2025 MOVEMENT!

And Happy Valentine's Day to all those cardiovascular scientists out there! 🫀(😘)

#AcademicSky 🧪
standupforscience.bsky.social
Three weeks until #standupforscience2025!

We’ve had incredible support, with volunteers signing up across 25 states – but we’re not stopping there! We’re still looking for passionate advocates who believe in the power of science to make a difference.

Sign up today! airtable.com/app4h5wUssMG...
Reposted by David J. Gillcrist