位い相そう同どう型けい

noun, na-adjective

homeomorphism; topological equivalence

Mathematics term: a continuous bijection between topological spaces whose inverse is also continuous. Used in topology.

• ドーナツとコーヒーカップは位い相そう同どう型けいである。

  A doughnut and a coffee cup are homeomorphic.

• この写しゃ像ぞうが位い相そう同どう型けいであることを示しめせ。

  Show that this mapping is a homeomorphism.