pa, diferencijal u nekoj tocki domene je jedan linearan operator.
jakobijeva matrica je numericki reprezentant diferencijala dane funkcije u danoj tocki, u paru kanonskih baza prostora domene, odnosno kodomene, u istome smislu u kojem se svaki linearan operator moze reprezentirati matricom. a to je prica s linearne. 
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`To begin with, a dog's not mad. You grant that? 'Well, then,' the Cat went on, `you see, a dog growls when it's angry, and wags its tail when it's pleased. Now I growl when I'm pleased, and wag my tail when I'm angry. Therefore I'm mad.'
