One idle evening last October, Mehtaab Sawhney took up an old pastime. He began perusing the website erdosproblems.com, an updated record of the 1,179 conjectures left behind by the eccentric and ...
What are the most pressing global crises in 2026? Each year, the International Rescue Committee’s (IRC) Emergency Watchlist identifies the countries at greatest risk of new or worsening humanitarian ...
(set-logic QF_S) (declare-fun a () String) (assert (= (str.substr (str.++ a a "0") 0 6) (str.++ a "a"))) (check-sat) (get-model) Here's the behavior > z3 bug.smt2 ...
Five years ago, mathematicians Dawei Chen and Quentin Gendron were trying to untangle a difficult area of algebraic geometry involving differentials, elements of calculus used to measure distance ...
"Instead of studying one problem at a time for months, which is the norm, we're going to be studying 10,000 problems a year … and do things that you just can't dream of doing today." Rather than AI ...
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Consider someone who’s perfectly content with their office chair. It’s not ergonomic, it doesn’t have lumbar support, but it works. Then, during a meeting or a visit to a friend’s office, they sit in ...
Entrepreneurs who build successful businesses often possess a unique ability to see what others don't—the critical bottlenecks hiding in plain sight that create frustration, inefficiency, and lost ...
Word problems try and tell students a story about the math problem in front of them. They are a useful way to connect abstract numbers to concrete situations, so students can learn early on to apply ...
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Users on Wednesday reported problems accessing a number of Meta's social media apps, including Facebook, Instagram, Threads and Messenger, according to outage tracking service Downdetector. Reports of ...
You are given a string s that consists of lowercase English letters. A string is called special if it is made up of only a single character. For example, the string "abc" is not special, whereas the ...
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