1. A proposition or corollary that follows naturally from a preceding theorem or proof, especially in geometry.
Usage: mathematics; formal; chiefly historical
2. In ancient Greek mathematics, a type of problem or theorem that asserts the possibility of finding or constructing something under given conditions.
Usage: mathematics history; archaic

Examples

• The porism that follows from the main theorem simplifies the proof considerably.
• Euclid's Elements contains several porisms alongside its primary propositions.
• The mathematician derived a useful porism from the established geometric principle.
• In classical geometry, a porism often provided a shortcut to solving related problems.
• The porism demonstrated that the construction was possible under the given constraints.