Anti-de Sitter space bell. It might be described as being the "opposite" of the surface of a sphere, which has a positive curvature. General relativity is a theory of the nature of time, space and gravity in which gravity is a curvature of space and time that results from the presence of matter or energy. Energy and mass are equivalent (as expressed in the equation "E" = "mc"), and space and time can be translated into equivalent units based on the speed of light ("c" in the "E" = "mc" equation). A common analogy involves the way that a dip in a flat
Sequence container (C++) pack the elements so that every codice_34 only uses one bit of memory.<ref name="C++03 23.2.5/1">ISO/IEC (2003). "ISO/IEC 14882:2003(E): Programming Languages - C++ §23.2.5 Class vector<bool> [lib.vector.bool]" para. 1</ref> This is widely considered a mistake. codice_36 does not meet the requirements for a C++ Standard Library container. For instance, a codice_37 must be a true of type codice_38. This is not the case with codice_39, which is a proxy class convertible to codice_34.<ref name="C++03 23.2.5/2">ISO/IEC (2003). "ISO/IEC 14882:2003(E): Programming Languages - C++ §23.2.5 Class vector<bool> [lib.vector.bool]" para. 2</ref> Similarly, the codice_41 does not yield a codice_42 when dereferenced. There is a