Letter Analysis of Turing Patterns on a Spherical Surface Using Polyhedron Approximation Takashi Yoshino Forma, Vol. 32 (No. 1), pp. 1-6, 2017 [Abstract] | [Full text] (PDF 896 KB) | [Attractive image Fig.3, Fig.5, Fig.6] Dominant Axis Theorem and the Area Preserving Lozi Map Yoshihiro Yamaguchi and Kiyotaka Tanikawa Forma, Vol. 32 (No. 1), pp. 7-17, 2017 [Abstract] | [Full text] (PDF 340 KB) | [Attractive image Fig.1, Fig.2] Determining Parastichy Numbers Using Discrete Fourier Transforms Riichirou Negishi, Kumiko Sekiguchi, Yuichi Totsuka and Masaya Uchida Forma, Vol. 32 (No. 1), pp. 19–27, 2017 [Abstract] | [Full text] (PDF 2.3 MB) | [Attractive image Fig.1, Fig.12, Fig.14] Generating Geometric Patterns Using Periodic Functions Katsumi Morita Forma, Vol. 32 (No. 1), pp. 29–41, 2017 [Abstract] | [Full text] (PDF 5.2 MB) | [Attractive image Fig.9, Fig.16, Fig.18]