T ∈ L(H) is a compact operator if the image of each bounded set under T is relatively compact.
Star Trek: Deep Space Nine | International Space Station | Space Shuttle | European Space Agency | Kennedy Space Center | National Air and Space Museum | Space Shuttle Challenger | Compact disc | compact disc | Hubble Space Telescope | Marshall Space Flight Center | Lost in Space | Lyndon B. Johnson Space Center | 2001: A Space Odyssey | Goddard Space Flight Center | Compact Disc | Three-dimensional space | Space Invaders | Compact Cassette | 2001: A Space Odyssey (film) | Space: 1999 | Space Shuttle Columbia | Symphony Space | space | Euclidean space | space shuttle | Space Shuttle Challenger disaster | Space Jam | David Hilbert | Space Shuttle Discovery |