Isegoria / Mathematics
Daily Mathematics: solutions
Every day I post two problem cards on Threads: a hard definite integral with a closed form, and an original Putnam-style problem. Each day below has full solutions to both, in English and Japanese. Newest first.
- 9 October 2026Integral: A squared logarithm against a Beta kernelCompetition problem: Alternating reciprocals of subset sums
- 8 October 2026Integral: A double integral with an arccos of a square rootCompetition problem: A Pólya urn and the ratio two to one
- 7 October 2026Integral: A trigonometric integral with a logarithmic denominatorCompetition problem: Inverting a matrix of Beta integrals
- 6 October 2026Integral: A Gaussian integral against two error functionsCompetition problem: A sharp constant for the distance-kernel quadratic form
- 5 October 2026Integral: A doubly logarithmic integral against a squared denominatorCompetition problem: A three-term scaling equation
- 4 October 2026Integral: A log-Gamma integral against a sine weightCompetition problem: The second moment of a random digraph determinant