Laurent Lessard
@laurentlessard.bsky.social
Associate Professor of MIE @Northeastern. Interested in control theory, optimization, math, and puzzles. The glass is twice as large as it needs to be.
Reposted by Laurent Lessard
Using* the most cursed #ALevelMaths Formula in #MathsToday
*absolutely not using but fun as a hook for Radians Sector lesson with Y12
*absolutely not using but fun as a hook for Radians Sector lesson with Y12
June 11, 2025 at 6:52 PM
Using* the most cursed #ALevelMaths Formula in #MathsToday
*absolutely not using but fun as a hook for Radians Sector lesson with Y12
*absolutely not using but fun as a hook for Radians Sector lesson with Y12
Reposted by Laurent Lessard
Wow. it must feel terrible when someone takes something you made and uses it without permission or payment
OpenAI says it has evidence China’s DeepSeek used its model to train competitor
https://www.ft.com/content/a0dfedd1-5255-4fa9-8ccc-1fe01de87ea6
https://www.ft.com/content/a0dfedd1-5255-4fa9-8ccc-1fe01de87ea6
OpenAI says it has evidence China’s DeepSeek used its model to train competitor
White House AI tsar David Sacks raises possibility of alleged intellectual property theft
www.ft.com
January 29, 2025 at 4:59 AM
Wow. it must feel terrible when someone takes something you made and uses it without permission or payment
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...
I wrote a short tutorial here:
laurentlessard.com/bookproofs/c...
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...
laurentlessard.com
January 26, 2025 at 8:31 PM
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...
I wrote a short tutorial here:
laurentlessard.com/bookproofs/c...
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...
My write-up: laurentlessard.com/bookproofs/2...
December 22, 2024 at 8:13 PM
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...
My write-up: laurentlessard.com/bookproofs/2...
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...
Turns out it's NOT a regular 3x3 lattice! @xaqwg.bsky.social
write-up:
laurentlessard.com/bookproofs/p...
December 9, 2024 at 12:29 AM
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...
Turns out it's NOT a regular 3x3 lattice! @xaqwg.bsky.social
write-up:
laurentlessard.com/bookproofs/p...