## Definitions

### from Wiktionary, Creative Commons Attribution/Share-Alike License

- n. Either of two laws in formal logic which state that:
- n. Either of two laws in set theory which state that:
- n. Any of various laws similar to De Morganβs laws for set theory and logic; for example:βΒ¬βπ₯ π(π₯) β βπ₯ Β¬π(π₯)

## Etymologies

Named after its

*eponym*, the British mathematician and logician Augustus De Morgan (1806β1871), who first formulated the laws in formal*propositional logic*. (Wiktionary)## Examples

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