Research Themes with a Playful Spirit Bowed stringLogistic map and scratching soundListen to the sound of twinkling starsWhere does the 4-digit number 2020, the year of the Tokyo Olympic and Paralympic Games, appear in the first ten thousand digits of π?How about the year 2025 of Osaka expo?Logo of Tokyo 2020 and rhombus puzzle Designs of 12 Signs of the Chinese Zodiac2025 Serpent – 2011 Hare Book InformationList of 70 HTML Color Codes with Names
