The Thread That Transforms
Neither from a thread to a sandal-strap, nor will I take from whatever is yours… (Genesis 14:23) After defeating five kings, Abraham (then called Abram)
October 30, 2025 / 8 Heshvan 5786
No Comments
tzitzit
Ẓiẓit, Koraḥ, and Wave-Particle Duality
The Lord spoke to Moses, saying: Speak to the children of Israel and you shall say to them that they shall make for themselves fringes
July 2, 2019 / 29 Sivan 5779
3 Comments
Three-and-a-half Hakafot — Topology of Simchat Torah
Why is this night different from all other nights, asks a child on the Seder night. On this Simchat Torah I asked a different question—why
October 15, 2017 / 25 Tishri 5778
No Comments
String Theory
Speak to the children of Israel and you shall say to them that they shall make for themselves fringes on the corners of their garments,
June 15, 2015 / 28 Sivan 5775
No Comments