For every Boolean algebra there is a Boolean ring corresponding to it. The prime spectrum of a Boolean ring is a Stone space.
NGC 6302 lies about 4,000 light-years away in the arachnologically correct constellation Scorpius.
The voice of God To mortal ear is dreadful.
exposed to the elements
アカウントを持っていませんか？ 新規登録
アカウントを持っていますか？ ログイン
DiQt（ディクト）
無料
★★★★★★★★★★
