# Definition Of Derivative Function:Logical Error In Mathematics

### Abstract

The critical analysis of the foundations of the differential calculus is proposed. Methodological basis of the analysis is the unity of formal logic and of rational dialectics. It is shown that differential calculus is fictitious mathematical theory because the concept of the limiting process is the starting point for definition of the derivative function. The passage to the limit “zero” in the definition of the derivative function signifies that the variable quantity takes the only essential value “zero”. This fact leads to the following errors. (1) The definition of the derivative function is based on the violation of the necessary and sufficient condition for the validity of the relationship between the increment of the function argument and the increment of the function because the increment of the function is divided by the zero increment of the argument in the case of the limiting process. (2) The definition of the derivative function is based on the contradiction which is that the increment of the argument is both zero and not zero in the same relationship. This contradiction represents a violation of the formal-logical law of identity and of the formal-logical law of the lack of contradiction. (3) The definition of the differential of function is based on two contradictory (mutually exclusive) features: the differential of the argument is not zero while the increment of the argument in the definition of the derivative function is zero.

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### References

T.Z. Kalanov, “Critical analysis of the foundations of differential and integral calculus”. MCMS (Ada Lovelace Publications), (2011), pp. 34-40.

T.Z. Kalanov, “Logical analysis of the foundations of differential and integral calculus”. Indian Journal of Science and Technology, Vol. 4, No. 12 (2011).

T.Z. Kalanov, “Logical analysis of the foundations of differential and integral calculus”. Bulletin of Pure and Applied Sciences, Vol. 30 E (Math.& Stat.), No. 2 (2011), pp. 327-334.

T.Z. Kalanov, “Critical analysis of the foundations of differential and integral calculus”. International Journal of Science and Technology, Vol. 1, No. 2 (2012), pp.80-84.

T.Z. Kalanov, “On rationalization of the foundations of differential calculus”. Bulletin of Pure and Applied Sciences, Vol. 31 E (Math. & Stat.), No. 1 (2012), pp. 1-7.

T.Z. Kalanov, “Critical analysis of the mathematical formalism of theoretical physics. I. Foundations of differential and integral calculus”. Bulletin of the Amer. Phys. Soc., (April Meeting), Vol. 58, No. 4 (2013).

T.Z. Kalanov. “On the formal–logical analysis of the foundations of mathematics applied to problems in physics”. Aryabhatta Journal of Mathematics & Informatics, Vol. 7, No. 1 (2015), pp. 1-2.

T.Z. Kalanov. “On the formal-logical analysis of the foundations of mathematics applied to problems in physics”. Bulletin of the Amer. Phys. Soc., (April Meeting), (2016).

T.Z. Kalanov. “Critical analysis of the foundations of pure mathematics”. Mathematics and Statistics (CRESCO, http://crescopublications.org), Vol. 2, No. 1 (2016), pp. 2-14.

T.Z. Kalanov. “Critical analysis of the foundations of pure mathematics”. International Journal for Research in Mathematics and Mathematical Sciences, Vol. 2, No. 2 (2016), pp. 15-33.

T.Z. Kalanov. “Critical analysis of the foundations of pure mathematics”. Aryabhatta Journal of Mathematics & Informatics, Vol. 8, No. 1 (2016), pp. 1-14 (Article Number: MSOA-2-005).

T.Z. Kalanov. “Critical Analysis of the Foundations of Pure Mathematics”. Philosophy of Mathematics Education Journal, ISSN 1465-2978 (Online). Editor: Paul Ernest), No. 30 (October 2016).

T.Z. Kalanov. “On the formal–logical analysis of the foundations of mathematics applied to problems in physics”. Asian Journal of Fuzzy and Applied Mathematics, Vol. 5, No. 2 (2017), pp. 48-49.

T.Z. Kalanov. The critical analysis of the foundations of mathematics. Mathematics: The Art of Scientific Delusion. LAP LAMBERT Academic Publishing (2017-12-05). ISBN-10: 620208099X.

V.I. Smirnov. Course of higher mathematics, V. 1. Moscow, 1974.

N.N. Luzin. Differential calculus. Moscow, 1952.

T.Z. Kalanov, “Critical analysis of the foundations of differential and integral calculus”. MCMS (Ada Lovelace Publications), (2011), pp. 34-40.

T.Z. Kalanov, “Logical analysis of the foundations of differential and integral calculus”. Indian Journal of Science and Technology, Vol. 4, No. 12 (2011).

T.Z. Kalanov, “Logical analysis of the foundations of differential and integral calculus”. Bulletin of Pure and Applied Sciences, Vol. 30 E (Math.& Stat.), No. 2 (2011), pp. 327-334.

T.Z. Kalanov, “Critical analysis of the foundations of differential and integral calculus”. International Journal of Science and Technology, Vol. 1, No. 2 (2012), pp.80-84.

T.Z. Kalanov, “On rationalization of the foundations of differential calculus”. Bulletin of Pure and Applied Sciences, Vol. 31 E (Math. & Stat.), No. 1 (2012), pp. 1-7.

T.Z. Kalanov, “Critical analysis of the mathematical formalism of theoretical physics. I. Foundations of differential and integral calculus”. Bulletin of the Amer. Phys. Soc., (April Meeting), Vol. 58, No. 4 (2013).

T.Z. Kalanov. “On the formal–logical analysis of the foundations of mathematics applied to problems in physics”. Aryabhatta Journal of Mathematics & Informatics, Vol. 7, No. 1 (2015), pp. 1-2.

T.Z. Kalanov. “On the formal-logical analysis of the foundations of mathematics applied to problems in physics”. Bulletin of the Amer. Phys. Soc., (April Meeting), (2016).

T.Z. Kalanov. “Critical analysis of the foundations of pure mathematics”. Mathematics and Statistics (CRESCO, http://crescopublications.org), Vol. 2, No. 1 (2016), pp. 2-14.

T.Z. Kalanov. “Critical analysis of the foundations of pure mathematics”. International Journal for Research in Mathematics and Mathematical Sciences, Vol. 2, No. 2 (2016), pp. 15-33.

T.Z. Kalanov. “Critical analysis of the foundations of pure mathematics”. Aryabhatta Journal of Mathematics & Informatics, Vol. 8, No. 1 (2016), pp. 1-14 (Article Number: MSOA-2-005).

T.Z. Kalanov. “Critical Analysis of the Foundations of Pure Mathematics”. Philosophy of Mathematics Education Journal, ISSN 1465-2978 (Online). Editor: Paul Ernest), No. 30 (October 2016).

T.Z. Kalanov. “On the formal–logical analysis of the foundations of mathematics applied to problems in physics”. Asian Journal of Fuzzy and Applied Mathematics, Vol. 5, No. 2 (2017), pp. 48-49.

T.Z. Kalanov. The critical analysis of the foundations of mathematics. Mathematics: The Art of Scientific Delusion. LAP LAMBERT Academic Publishing (2017-12-05). ISBN-10: 620208099X.

V.I. Smirnov. Course of higher mathematics, V. 1. Moscow, 1974.

N.N. Luzin. Differential calculus. Moscow, 1952.

T.Z. Kalanov, “Critical analysis of the foundations of differential and integral calculus”. MCMS (Ada Lovelace Publications), (2011), pp. 34-40.

T.Z. Kalanov, “Logical analysis of the foundations of differential and integral calculus”. Indian Journal of Science and Technology, Vol. 4, No. 12 (2011).

T.Z. Kalanov, “Logical analysis of the foundations of differential and integral calculus”. Bulletin of Pure and Applied Sciences, Vol. 30 E (Math.& Stat.), No. 2 (2011), pp. 327-334.

T.Z. Kalanov, “Critical analysis of the foundations of differential and integral calculus”. International Journal of Science and Technology, Vol. 1, No. 2 (2012), pp.80-84.

T.Z. Kalanov, “On rationalization of the foundations of differential calculus”. Bulletin of Pure and Applied Sciences, Vol. 31 E (Math. & Stat.), No. 1 (2012), pp. 1-7.

T.Z. Kalanov, “Critical analysis of the mathematical formalism of theoretical physics. I. Foundations of differential and integral calculus”. Bulletin of the Amer. Phys. Soc., (April Meeting), Vol. 58, No. 4 (2013).

T.Z. Kalanov. “On the formal–logical analysis of the foundations of mathematics applied to problems in physics”. Aryabhatta Journal of Mathematics & Informatics, Vol. 7, No. 1 (2015), pp. 1-2.

T.Z. Kalanov. “On the formal-logical analysis of the foundations of mathematics applied to problems in physics”. Bulletin of the Amer. Phys. Soc., (April Meeting), (2016).

T.Z. Kalanov. “Critical analysis of the foundations of pure mathematics”. Mathematics and Statistics (CRESCO, http://crescopublications.org), Vol. 2, No. 1 (2016), pp. 2-14.

T.Z. Kalanov. “Critical analysis of the foundations of pure mathematics”. International Journal for Research in Mathematics and Mathematical Sciences, Vol. 2, No. 2 (2016), pp. 15-33.

T.Z. Kalanov. “Critical analysis of the foundations of pure mathematics”. Aryabhatta Journal of Mathematics & Informatics, Vol. 8, No. 1 (2016), pp. 1-14 (Article Number: MSOA-2-005).

T.Z. Kalanov. “Critical Analysis of the Foundations of Pure Mathematics”. Philosophy of Mathematics Education Journal, ISSN 1465-2978 (Online). Editor: Paul Ernest), No. 30 (October 2016).

T.Z. Kalanov. “On the formal–logical analysis of the foundations of mathematics applied to problems in physics”. Asian Journal of Fuzzy and Applied Mathematics, Vol. 5, No. 2 (2017), pp. 48-49.

T.Z. Kalanov. The critical analysis of the foundations of mathematics. Mathematics: The Art of Scientific Delusion. LAP LAMBERT Academic Publishing (2017-12-05). ISBN-10: 620208099X.

V.I. Smirnov. Course of higher mathematics, V. 1. Moscow, 1974.

N.N. Luzin. Differential calculus. Moscow, 1952.

V.I. Smirnov. Course of higher mathematics, V. 1. Moscow, 1974.

N.N. Luzin. Differential calculus. Moscow, 1952.

V.I. Smirnov. Course of higher mathematics, V. 1. Moscow, 1974.

N.N. Luzin. Differential calculus. Moscow, 1952.

V.I. Smirnov. Course of higher mathematics, V. 1. Moscow, 1974.

N.N. Luzin. Differential calculus. Moscow, 1952.

V.I. Smirnov. Course of higher mathematics, V. 1. Moscow, 1974.

N.N. Luzin. Differential calculus. Moscow, 1952.

V.I. Smirnov. Course of higher mathematics, V. 1. Moscow, 1974.

N.N. Luzin. Differential calculus. Moscow, 1952.

V.I. Smirnov. Course of higher mathematics, V. 1. Moscow, 1974.

N.N. Luzin. Differential calculus. Moscow, 1952.

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