indefinite inner product spare Krein space
spare no effort spare no pains
alignment space generated by metric space
CL-space and almost CL-space
conscious space and virtual space
Hardy space and weak Hardy space
mapping between the operation space and pattern space
mapping from virtual axis space to real axis space
non-commutative space NC space
product space of approximation space
Product space of FC-space
Real space and virtual space
separating dry space from moist space
sequence space based on distinct position space
Space warfare(Outer-space battle)
Space(Outer-space)battlefield
Space-based Space Surveillance