Journal of Formalized Mathematics
Volume 2, 1990
University of Bialystok
Copyright (c) 1990 Association of Mizar Users

The Limit of a Real Function at a Point


Jaroslaw Kotowicz
Warsaw University, Bialystok
Supported by RPBP.III-24.C8.

Summary.

We define the proper and the improper limit of a real function at a point. The main properties of the operations on the limit of function are proved. The connection between the one-side limits and the limit of function at a point are exposed. Equivalent Cauchy and Heine characterizations of the limit of real function at a point are proved.

MML Identifier: LIMFUNC3

The terminology and notation used in this paper have been introduced in the following articles [13] [15] [2] [14] [4] [1] [16] [3] [11] [6] [5] [12] [9] [10] [7] [8]

Contents (PDF format)

Bibliography

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[2] Grzegorz Bancerek. The ordinal numbers. Journal of Formalized Mathematics, 1, 1989.
[3] Czeslaw Bylinski. Functions from a set to a set. Journal of Formalized Mathematics, 1, 1989.
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[6] Jaroslaw Kotowicz. Real sequences and basic operations on them. Journal of Formalized Mathematics, 1, 1989.
[7] Jaroslaw Kotowicz. The limit of a real function at infinity. Journal of Formalized Mathematics, 2, 1990.
[8] Jaroslaw Kotowicz. The one-side limits of a real function at a point. Journal of Formalized Mathematics, 2, 1990.
[9] Jaroslaw Kotowicz. Partial functions from a domain to the set of real numbers. Journal of Formalized Mathematics, 2, 1990.
[10] Jaroslaw Kotowicz. Properties of real functions. Journal of Formalized Mathematics, 2, 1990.
[11] Jan Popiolek. Some properties of functions modul and signum. Journal of Formalized Mathematics, 1, 1989.
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[14] Andrzej Trybulec. Subsets of real numbers. Journal of Formalized Mathematics, Addenda, 2003.
[15] Zinaida Trybulec. Properties of subsets. Journal of Formalized Mathematics, 1, 1989.
[16] Edmund Woronowicz. Relations and their basic properties. Journal of Formalized Mathematics, 1, 1989.

Received September 5, 1990


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