Axiomatic definition of hyperbolic functions
Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki, Functional analysis and theory of functions. 6, Tome 129 (1969) no. 3, pp. 65-75
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@article{UZKU_1969_129_3_a4,
author = {A. Ya. Vol'pert},
title = {Axiomatic definition of hyperbolic functions},
journal = {U\v{c}\"enye zapiski Kazanskogo universiteta. Seri\^a Fiziko-matemati\v{c}eskie nauki},
pages = {65--75},
year = {1969},
volume = {129},
number = {3},
language = {ru},
url = {http://geodesic.mathdoc.fr/item/UZKU_1969_129_3_a4/}
}
A. Ya. Vol'pert. Axiomatic definition of hyperbolic functions. Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki, Functional analysis and theory of functions. 6, Tome 129 (1969) no. 3, pp. 65-75. http://geodesic.mathdoc.fr/item/UZKU_1969_129_3_a4/