Charles Weibel authored an exposition of bilinear forms over a field. It develops diagonalization and the classification of symmetric bilinear forms, including the real signature described by Sylvester's law of inertia. These classifications explain why changing a basis can simplify a form without removing invariants such as its numbers of positive and negative squares.[ref]
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Charles Weibel is not a widely recognized figure in popular culture, politics, or science, based on information available up to October 2023. However, if you are referring to "Weibel" in another context, it might refer to concepts or terms associated with individuals named Charles Weibel, such as in academia or specific fields.