boundary

Deductions

• mathematical concept is for example boundary ⇐ (boundary is a mathematical concept), (is a is inverse of is for example)
• boundary is a mathematical concept ⇐ (topological property is subclass of mathematical concept), (boundary is a topological property)
• topological property is for example boundary ⇐ (boundary is a topological property), (is a is inverse of is for example)
• invariant is for example boundary ⇐ (boundary is a invariant), (is a is inverse of is for example)
• boundary is a invariant ⇐ (topological property is subclass of invariant), (boundary is a topological property)
• outer inner location has part boundary ⇐ (outer inner location is subclass of region of space), (region of space has part boundary)