In 44 patients with suspected dissecting aneurysm of the aorta, an aortographic diagnosis of dissection, based on the demonstration of a narrowed true lumen and of a false channel, was made in 23.

Dudeney’s original solution for transforming an equilateral triangle into a perfect square through dissection involves only four pieces, a solution that has now been proved to be the optimal solution.

Professor Uehara from JAIST works at the frontiers of discrete mathematics and theoretical computer science to solve complex problems related to puzzles, games, and origami. His research reveals how ...