Q.e.d.

"Q.e.d." in Polish

c.b.d.o.

(''initialism placed at the end of a mathematical proof to show that the theorem under discussion is proved'')

c.b.d.u.

(''initialism placed at the end of a mathematical proof to show that the theorem under discussion is proved'')

ckd.

(''initialism placed at the end of a mathematical proof to show that the theorem under discussion is proved'')

cnd.

(''initialism placed at the end of a mathematical proof to show that the theorem under discussion is proved'')

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.