Pareu (matematicas) : Diferéncia entre lei versions

: (''a'', ''b'') = (''a' '', ''b' '') <math>\ \iff</math> (''a'' = ''a' '') <math>\wedge</math> (''b'' = ''b' '') (lolei simbòlsimbòls logiclogics "<math>\iff</math>" e "<math>\wedge </math>"se lièjon respectivament "se liègee solament se", "e")