TeXipedia

blacklozenge

Represents a filled diamond or lozenge shape, commonly used as a decorative marker or to denote the end of a proof.

Overview

Serves as an alternative to the traditional square end-of-proof symbol (QED marker) in mathematical writing, offering a more distinctive visual style.

  • Popular in modern mathematical texts and journal articles
  • Often used to mark the conclusion of theorems, lemmas, or proofs
  • Can function as a bullet point or decorative element in technical documents
  • Provides visual contrast against white space, making it effective for document organization

Examples

End of proof alternative using filled diamond symbol.

x2+2x+1=(x+1)2⧫x^2 + 2x + 1 = (x + 1)^2 \blacklozenge 
x^2 + 2x + 1 = (x + 1)^2 \blacklozenge

Marking important equations with a distinctive symbol.

E=mc2⧫E = mc^2 \quad \blacklozenge 
E = mc^2 \quad \blacklozenge

Using filled diamond as a decorative bullet point.

⧫ Keytheoremfollows:\blacklozenge\ Key theorem follows: 
\blacklozenge\ Key theorem follows: