Shintaro Sakai

Research

Recurrence Formula of Stamp Folding Problem

Article January 23, 2026

There is an unsolved problem that has plagued mathematicians for a long time, the "stamp folding problem" (strictly, is there a formula for counting the solutions to the stamp folding problem?). In this paper, I have succeeded in expressing the stamp-folding problem by a recurrence formula with an elegant idea.