Journal of the
Korean Mathematical Society
JKMS

ISSN(Print) 0304-9914 ISSN(Online) 2234-3008

Article

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J. Korean Math. Soc. 2007; 44(1): 55-107

Printed January 1, 2007

Copyright © The Korean Mathematical Society.

On the infinite products derived from theta series I

Daeyeoul Kim and Ja Kyung Koo

Chonbuk National University, KAIST

Abstract

Let $k$ be an imaginary quadratic field, $\frak h$ the complex upper half plane, and let $\tau\in \frak h \cap k$, $q=e^{\pi i \tau}$. In this article, we obtain algebraic numbers from the $130$ identities of Rogers-Ramanujan continued fractions investigated in [28] and [29] by using Berndt's idea ([3]). Using this, we get special transcendental numbers. For example, $\frac{q^{1/8}}{1} {{}\atop {+}} \frac{-q}{1+q}\ {{}\atop {+}} \frac{-q^2 }{1+q^2 } {{}\atop {+}} {{}\atop {\cdots}}$ ([1]) is transcendental.

Keywords: transcendental number, algebraic number, theta series, Rogers-Ramanujan identities

MSC numbers: 11Jxx, 11R04, 11F11