Leo C. Stein

@duetosymmetry.com

Physics Prof @ U of MS. Sloan Fellow. Black holes, gravitational waves, general relativity & beyond. Formerly Caltech MIT Cornell. Need thin pizza + fruity coffee. He/him 🌐 https://duetosymmetry.com/ @duetosymmetry everywhere

The flowchart from hell of python dependency management

Cover art from the 1991 album "We can't dance" by Genesis

One panel of a comic, with an algebraist (labeled with A on their chest) saying 'Where's your precious "visual intuition" now, Jenkins!? HAHAHAHA!' to a geometer (with G on their chest) who is crying

Fig. 1 from the paper: A cardinal (bird) with a chirp waveform emanating from its mouth; a magnifying glass held over the head of another cardinal reveals a binary black hole in its neck.

Figure caption: The central tenet of this paper: careful investigation of the calls of certain birds may reveal that these creatures actually conceal compact binaries whose radiated gravitational waves match the “chirps” we observe in nature.

Screenshot from the bluesky app, showing a photo of Joan Baez right above a skeet from John Baez

Fig. 2 from the paper. Caption:
FIG. 2. The center-of-mass charge vector G (in blue) obtained from the asymptotic data of a quasicircular nonprecessing system SXS:BBH:2115. Before frame-fixing (left panel), G starts closer to the origin and drifts away in a boosted outspiral. A fit to the boosted post-Newtonian prediction of Eq. (26) (orange, dashed) agrees well with numerical data. Notice the difference in scales after fixing the PNBMS frame (right panel). The small box near the origin in the left plot correspond to the range of CoM charge after fixing the frame. This plot includes times in the 15%–85% region between the metadata’s reference_time and the time of the maximum norm of h across the entire 2-sphere.

One girl is standing over another, holding second girl's hair in one hand and a bottle of milk in the other, while forcing second girl to drink the milk. The first girl is labeled "Math grads on twitter". The second girl is labeled "Physicists just trying to solve a differential equation". The milk is labeled "sheaves sites spectra"

A basin exit plot, showing chaotic structure

Black and white tarot-like drawing of a warrior fighting a skeleton.
What are the four core character classes?

Figure 1 from the above-linked paper, with three panels. Caption:

Figure 1. The normal cone (a) of the evolution equations for the constraint violations in the cotangent space, and the corresponding ray cone (b) in the tangent space. The geometric mean cones (shown in green) are not part of the normal or the ray cone. The causal cone (c) is the convex hull of the causal cones of of the two individual systems, which encloses the ray cones (b).

Figure 3.4 from Lichtenberg + Lieberman, showing a zoom into a heteroclinic tangle at a hyperbolic fixpoint

A diagram depicting four hyperbolic fixpoints, each with stable and unstable manifolds asymptoting to/away from them. Because of the area preservation property, there are infinitely intricate folds in these manifolds (only a finite number of which have been illustrated).

$Typeset image of the following LaTeX code: \cos\frac{2\pi}{17} =& -\frac{1}{16} + \frac{\sqrt{17}}{16}+\frac{1}{16} \sqrt{34-2 \sqrt{17}} \\ &{}+\frac{1}{8} \sqrt{17+3 \sqrt{17} -\sqrt{34-2 \sqrt{17}} -2 \sqrt{2 \sqrt{17}+34}}$