Subjective Spaces from Zero to Four Dimensions

English: Based on the central projection framework and the interpretive structure of dimension addition, we describe subjective spaces from zero to four dimensions. For each dimension, the newly emerging geometric properties (area, angle, volume, hypervolume, and associated orientation structures) and their correspondence with standard results are catalogued. No new theorems are proved. The treatment up to four dimensions is a matter of expository convenience and does not claim a geometric reason for stopping at four. No physical claims are made. 日本語: 中心投影フレームワークおよび次元追加の解釈的構造に基づき、ゼロ次元から四次元までの主観空間について、各次元で生まれる幾何学的性質(面積、角度、体積、超体積、表裏構造)と定説との対応を記述する。新たな証明は含まない。四次元までの記述は考察上の便宜であり、停止条件の主張ではない。物理的主張は含まない。