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Laurent Lessard

@laurentlessard.bsky.social
84 followers 46 following 7 posts

Associate Professor of MIE @Northeastern. Interested in control theory, optimization, math, and puzzles. The glass is twice as large as it needs to be.

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Buttons (Ashley) 🏴‍☠️#OFMDForLife🏴‍☠️ 🏳️‍🌈🤡 @sevensugars.bsky.social · 17/06/2026
Since I did do my PhD in cyanobacteria growth and treatment optimization modeling AND work in the water treatment industry, I’m gonna share my theory as to what’s happening here and how to fix it. People are focusing on the painted bottom of the pool increasing residual heat, and while that 1/19
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Maxim Raginsky @mraginsky.bsky.social · 19/04/2026
archive.ph/2026.04.13-1...
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MrLevMaths @mrlevmaths.bsky.social · 11/06/2025
Using* the most cursed #ALevelMaths Formula in #MathsToday *absolutely not using but fun as a hook for Radians Sector lesson with Y12
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Laurent Lessard @laurentlessard.bsky.social · 30/01/2025
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Reposted by Laurent Lessard
Bobby Silverman @robertsilverman.bsky.social · 29/01/2025
Wow. it must feel terrible when someone takes something you made and uses it without permission or payment
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Laurent Lessard @laurentlessard.bsky.social · 26/01/2025
This week's #Fiddler puzzle is a random walk: From (k), you hop to (k-1) with probability 1/k and hop to (k+1) otherwise. If you start at (2), what is the probability you eventually hop to (1)? @xaqwg.bsky.social I wrote a short tutorial here: laurentlessard.com/bookproofs/c...
laurentlessard.com
Can you hop to the lily pad? - Book Proofs
This week's Fiddler is about hopping back and forth. You are a frog in a pond with an infinite number of lily pads in a line, marked "1," "2," "3," etc. You are currently on pad 2, and your goal is to...
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Laurent Lessard @laurentlessard.bsky.social · 22/12/2024
This week's #Fiddler: Assign distinct prime numbers to the vertices of a dodecahedron so the sum of the vertices of each face sum to 2025. I modeled this as an integer linear program. Here is one possible solution. @xaqwg.bsky.social My write-up: laurentlessard.com/bookproofs/2...
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Laurent Lessard @laurentlessard.bsky.social · 09/12/2024
This week's #Fiddler: what is the minimum-energy way to pack 9 particles in a unit square, where energy is measured as the sum of 1/dist over all pairs of particles? Turns out it's NOT a regular 3x3 lattice! @xaqwg.bsky.social write-up: laurentlessard.com/bookproofs/p...
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