Math Problem Statement
Sei A ∈ Mmn(K) eine Matrix, sodass XA = 0 ∈ Mmn(K) für alle Matrizen X ∈ Mmm(K) gilt. Beweisen Sie, dass A die Nullmatrix in Mmn(K) ist.
Solution
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Math Problem Analysis
Mathematical Concepts
Linear Algebra
Matrix Multiplication
Zero Matrix
Formulas
X A = 0
e_i e_i^T A = 0
Theorems
Zero Product Property
Matrix Isolation via Unit Vectors
Suitable Grade Level
University Level