# <i>Simplex sigillum veri:</i> Peano, Frege, and Peirce on the Primitives of Logic

> Research article (History and Philosophy of Logic, 2017) · cited 18× · AI/ML

**Wikidata**: [openalex:W2751050427](https://www.wikidata.org/wiki/openalex:W2751050427)  
**Source**: https://4ort.xyz/entity/i-simplex-sigillum-veri-i-peano-frege-and-peirce-on-the-primitives-of-logic