Anti-de sitter space, although it is infinite, has a "boundary, " located out at infinity.

反德西特空间虽然无穷大，却有个位于无穷远的“边界”。

youdao

Anti-de sitter space, although it is infinite, has a "boundary, " located out at infinity.

反德西特空间虽然无穷大，却有个位于无穷远的“边界”。

youdao