Javier Perez-Capdevila (an haife shi a ranar 7 ga Fabrairu, 1963) masanin kimiyya ne, kuma masanin lissafi, farfesa, sananne ne game da gabatarwar da aka samu na cakuɗin hadaɗɗen lissafi, tsakanin sauran gudummawar ka'idoji ga lissafe lissafe. Daga ma'anar nuni ko daidaito na cancanta da Jaume Gil Aluja ya bayar a cikin 1996, yawancin zanawa zuwa dacewar na iya faruwa. Don warware shi, Pérez Capdevila ya gabatar da dabarun masu nauyi a daidaitawa, mai rikitarwa don daidaitattun daidaito da daidaita daidaitattun daidaituwa don daidaitattun daidaito, wanda ya bayyana tare da daidaito, don kwance cikin lambobi marasa iyaka tare da daidaito daidai, don haka zagaye fitar da ka'ida game da cancantar 'yan takara don saiti kan bayanai [1] An gina aikin cakuda da abubuwa masu jujjuya, inda daga abubuwa na yanayi daban-daban ake samun sabbin abubuwa tare da wasu darajojinsu na kasancewa. [2] [3] [4] [5] A fagen ilimin lissafi kuwa ya sami ci gaba masu mahimmanci game da kimanta tasirin tattalin arziki da kula da nau'ikan baƙin baƙi masu mamayewa, kuma ya cika mahimman abubuwan ba da gudummawa.