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Reverted 1 edit by 95.64.137.62 (talk): Do not confuse scalar multiplication and ring multiplication |
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#<math> r \cdot ( x + y ) = r \cdot x + r \cdot y </math>,
#<math> ( r + s ) \cdot x = r \cdot x + s \cdot x </math>,
#<math> ( r
#<math> 1 \cdot x = x .</math>
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