• Bijection, injection and surjection - Wikipedia
  In mathematics, injections, surjections and bijections are classes of functions distinguished by the manner in which arguments (input expressions from the domain) and images (output expressions from the codomain) are related or mapped to each other.
  and axiom bijection bijective bourbaki cardinality category choice codomain domain function injection mathematics surjection
  in Educational > Mathematics > Ideas/Explanations/Wiki or Mathworld lookups with bijection community-based community-driven educational functions injection maps math mathematics maths surjection uni university wiki wikipedia wikipedia.org
  Note: Need to learn this.

surjection from all users