And the list:
Very focused on the International Mathematical Olympiad, notably they maintain all solutions at: artofproblemsolving.com/wiki/index.php/IMO_Problems_and_Solutions
Number of elements in a Farey sequence by 
Ciro Santilli 35 Updated 2024-12-15 +Created 2024-07-12
Ciro Santilli 35 Updated 2024-12-15 +Created 2024-07-12Company founded by Marc Verdiell in his garage, and later acquired by Intel which was going on a optoelectronics buying spree. The division was later sold off in 2023 of course during more difficult times: www.theregister.com/2023/10/31/intel_silicon_photonics_jabil/
It's hard to understand exactly what the company did by Googling it nowadays. Sad and usual fate. Presumably something related to transceiver for fiber-optic communication. Only the patents remain: patents.google.com/?assignee=lightlogic&oq=lightlogic to tell its story to the brave.
Entity against giving answer to problem sets by Ciro Santilli 35 Updated 2024-12-15 +Created 2024-07-12
Ciro Santilli 35 Updated 2024-12-15 +Created 2024-07-12www.quora.com/Is-MIT-the-only-place-where-homework-is-called-problem-sets
Terminology by location:
Places that say "problem set":Places that say "problem sheet":Places that say "example sheet":
Terminology by location:
Places that say "problem set":Places that say "problem sheet":Places that say "example sheet":
- University of Cambridge. Source: www.inference.org.uk/sanjoy/teaching/corpus/
Mechanics/Molecules (Fall term) example sheets (Cambridge jargon for problem sets)
Ciro Santilli's take on it: Section "Give answers".
International Mathematical Olympiad by Ciro Santilli 35 Updated 2024-12-15 +Created 2024-07-12
Ciro Santilli 35 Updated 2024-12-15 +Created 2024-07-12
Logo of the International Mathematical Olympiad
. Source. 
A "reduced fraction" is a fraction that has the smallest possible integer numerator and denominator for its value.
For example:is not a reduced fraction, because there is another fraction equal to it but with smaller numerator and denominator:
Hilbert's tenth problem is decidable for quadratic equations by Ciro Santilli 35 Updated 2024-12-15 +Created 2024-07-12
Ciro Santilli 35 Updated 2024-12-15 +Created 2024-07-12TODO is it or is not:
- mathoverflow.net/questions/207482/algorithmic-un-solvability-of-diophantine-equations-of-given-degree-with-given
- math.stackexchange.com/questions/181380/second-degree-diophantine-equations
- mathoverflow.net/questions/142938/is-there-an-algorithm-to-solve-quadratic-diophantine-equations
- math.stackexchange.com/questions/798609/is-there-any-solution-to-this-quadratic-diophantine-equation
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