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A formal proof or derivation is a finite sequence of sentences (called well-formed formulas in the case of a formal language) each of which is an axiom or follows from the preceding sentences in the sequence by a rule of inference. The last sentence in the sequence is a theorem of a formal system. The notion of theorem is not in general effective, therefore there may be no method by which we can always find a proof of a given sentence or determine that none exists. The concept of natural deduction is a generalization of the concept of proof.[1]
A formal proof or derivation is a finite sequence of sentences (called well-formed formulas in the case of a formal language) each of which is an axiom or follows from the preceding sentences in the sequence by a rule of inference. The last sentence in the sequence is a theorem of a formal system. The notion of theorem is not in general effective, therefore there may be no method by which we can always find a proof of a given sentence or determine that none exists. The concept of natural deduction is a generalization of the concept of proof.[1]
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[[af:Bewys]]
[[af:Bewys]]
[[ar:برهان رياضي]]
[[ar:برهان رياضي]]
[[bat-smg:Matematėnis iruodėms]]
[[zh-min-nan:Chèng-bêng]]
[[ca:Demostració matemàtica]]
[[ca:Demostració matemàtica]]
[[cs:Matematický důkaz]]
[[cs:Matematický důkaz]]
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[[de:Beweis (Mathematik)]]
[[de:Beweis (Mathematik)]]
[[el:Μαθηματική απόδειξη]]
[[el:Μαθηματική απόδειξη]]
[[en:Mathematical proof]]
[[es:Demostración matemática]]
[[eo:Matematika pruvo]]
[[eo:Matematika pruvo]]
[[es:Demostración matemática]]
[[fa:برهان (ریاضی)]]
[[fa:برهان (ریاضی)]]
[[fi:Matemaattinen todistus]]
[[fr:Démonstration]]
[[fr:Démonstration]]
[[ko:증명]]
[[he:הוכחה]]
[[hu:Matematikai bizonyítás]]
[[id:Pembuktian Matematika]]
[[id:Pembuktian Matematika]]
[[is:Stærðfræðileg sönnun]]
[[is:Stærðfræðileg sönnun]]
[[it:Dimostrazione matematica]]
[[it:Dimostrazione matematica]]
[[he:הוכחה]]
[[ja:証明]]
[[ka:მათემატიკური დამტკიცება]]
[[ka:მათემატიკური დამტკიცება]]
[[ko:증명]]
[[la:Demonstratio mathematica]]
[[la:Demonstratio mathematica]]
[[lt:Matematinis įrodymas]]
[[lt:Matematinis įrodymas]]
[[hu:Matematikai bizonyítás]]
[[mk:Математички доказ]]
[[mk:Математички доказ]]
[[nds:Bewies (Mathematik)]]
[[nl:Wiskundig bewijs]]
[[nl:Wiskundig bewijs]]
[[ja:証明]]
[[nn:Matematisk bevis]]
[[no:Matematisk bevis]]
[[no:Matematisk bevis]]
[[nn:Matematisk bevis]]
[[nds:Bewies (Mathematik)]]
[[pl:Dowód (matematyka)]]
[[pl:Dowód (matematyka)]]
[[pt:Prova matemática]]
[[pt:Prova matemática]]
[[ru:Математическое доказательство]]
[[ru:Математическое доказательство]]
[[sh:Dokaz (matematika)]]
[[simple:Mathematical proof]]
[[simple:Mathematical proof]]
[[sl:Matematični dokaz]]
[[sl:Matematični dokaz]]
[[sh:Dokaz (matematika)]]
[[fi:Matemaattinen todistus]]
[[sv:Matematiskt bevis]]
[[sv:Matematiskt bevis]]
[[tl:Pang-matematikang patibay]]
[[ta:கணித நிறுவல்]]
[[ta:கணித நிறுவல்]]
[[tl:Pang-matematikang patibay]]
[[tr:Matematiksel tanıt]]
[[tr:Matematiksel tanıt]]
[[uk:Доведення]]
[[uk:Доведення]]
[[vi:Chứng minh toán học]]
[[vi:Chứng minh toán học]]
[[zh:證明]]
[[zh-classical:證明]]
[[zh-classical:證明]]
[[zh-min-nan:Chèng-bêng]]
[[zh-yue:數學證明]]
[[zh-yue:數學證明]]
[[bat-smg:Matematėnis iruodėms]]
[[zh:證明]]

ro moi lu'i ro mupli poi zasti pu le se detri be li 10:30, 29 ly. ze 2009

pixra be lo cipra be le pitagoras. zei cmacrteorema

ni'o lo cipra goi ko'a cu na'eci'imei porsi be lo jufra to se cmene lo drasu'a mekso vi lo drasu'a bangu toi noi me lo aksioma .a lo se lojycpa be fi lo purci jufra pe le porsi .i le romoi jufra pe le porsi cu cmacrteorema ci'e le drasu'a ciste