Welcome to AllensArea! This is a page for normal stuff.
4D Geometry
Types of 4D shapesBasic shapes in 4D
Geometry of tesseract
Regulars in 4D
Infinite families
Stars in 4D
Semiregulars in 4D
Hypersphere
Day-Night & seasons on 4D planet
Games
Word RiddleWord Finder
Miscellaneous
Abbreviationsallenf.sakura.ne.jp since Jun '22