The trace of a square matrix is the sum of the entries in the main diagonal. It satisfies trace(AB) = trace(BA), where A is m×n and B is n×m. For an n×n matrix A, then –trace(A) is the coefficient of xn–1 in the characteristic polynomial of A.
Statistics
Seematrix.
Electronics and Electrical Engineering
The image traced out by the luminous spot on the screen of a cathode-ray tube.
Geology and Earth Sciences
A recorded data-set for one channel. On a seismic-refraction record made for a 12-channel seismograph, each channel would provide one wave-form which, when viewed with the others, would give a seismic record. See alsowiggle trace.
Geography
As defined by J. Anderson (2010), traces are marks, residues, or remnants left in place. They may be material such as buildings, signs, statues, or graffiti; or non-material such as activities, events, performances, or emotions.