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estnikhuxxinetxreskchnkhxngthukestthimismbtipidphayitfngkchntwtamhlng cungsxdkhlxngscphcnkhxngepxaon thukcanwnthrrmchatiethakbestkhxngcanwnthrrmchatithnghmdthinxykwacanwnnn nnkhux 0 1 0 2 0 1 0 0 3 0 1 2 0 0 0 0 n 0 1 2 n 2 n 1 0 1 2 n 2 n 1 n 1 n 1 S n 1 lxangxing aekikh Von Neumann 1923Edmund Landau Foundations of Analysis Chelsea Pub Co ISBN 0 8218 2693 X Richard Dedekind Essays on the theory of numbers Dover 1963 ISBN 0 486 21010 3 Kessinger Publishing LLC 2007 ISBN 0 548 08985 X N L Carothers Real analysis Cambridge University Press 2000 ISBN 0 521 49756 6 Brian S Thomson Judith B Bruckner Andrew M Bruckner Elementary real analysis ClassicalRealAnalysis com 2000 ISBN 0 13 019075 6 exrik dbebilyu iwssitn Natural Number cakaemthewild duephim aekikhraychuxcanwnaehlngkhxmulxun aekikhAxioms and Construction of Natural Numbers Essays on the Theory of Numbers by Richard Dedekind at Project Gutenberg bthkhwamekiywkbkhnitsastrniyngepnokhrng khunsamarthchwywikiphiediyidodyephimkhxmul 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