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Every good mathematician is at least half a philosopher, and every good philosopher is at least half a mathematician.
Friedrich Ludwig Gottlob Frege
If two wrongs don't make a right, try three.
Welcome to MathPortal. This web site owner is mathematician Miloš Petrović.
I designed this web site and wrote all the lessons, formulas and calculators.
If you want to contact me, probably have some question write me using the contact form or email me on