“The goal of a definition is to introduce a mathematical object. The goal of a theorem is to state some of its properties, or interrelations between various objects. The goal of a proof is to make such a statement convincing by presenting a reasoning subdivided into small steps each of which is justified as an "elementary" convincing argument.” StatesGoalStepsObjectsArgumentMathematicsPropertyDefinitionsVariousProofStatementsMathematicalReasoningIntroducingJustifiedConvincingPresentingTheoremsSmall Steps Author:IU?. I. Manin
“John Walker, while he was in Afghanistan, told people his goal was to have four wives. ... Do we need any further proof that this guy is out of his mind? Four wives? That's how al Qaeda gets you to become a suicide bomber.” PeopleNeedsMindGuyGoalFourWifeSuicideProofAlsAfghanistanOld PeopleThis GuyAl QaedaWalkersBombersSuicide Bombers Author:David Letterman