SPECTRUM

Spectrum

The Spectrum, known also as the CoreStates Spectrum, First Union Spectrum, and Wachovia Spectrum was an indoor arena in Philadelphia, in the U.S. state of Pennsylvania. Opened in the fall of 1967 as part of what is now known as the South Philadelphia Sports Complex, after several expansions of its seating capacity it eventually accommodated 18,168 for basketball and 17,380 for ice hockey, arena football, indoor soccer, and indoor lacrosse.

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spectrum

Noun

  1. Specter, apparition.
  2. A range; a continuous, infinite, one-dimensional set, possibly bounded by extremes.
  3. Specifically, a range of colours representing light (electromagnetic radiation) of contiguous frequencies; hence electromagnetic spectrum, visible spectrum, ultraviolet spectrum, etc.
  4. The pattern of absorption or emission of radiation produced by a substance when subjected to energy (radiation, heat, electricity, etc.).
  5. The set of eigenvalues of a matrix.
  6. Of a bounded linear operator A, the set of scalar values λ such that the operator A—λI, where I denotes the identity operator, does not have a bounded inverse; intended as a generalisation of the linear algebra sense.


The above text is a snippet from Wiktionary: spectrum
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