Rare card
Crouzeix's conjecture
- Value
- 50 W
- Attack
- 760
- Defence
- 608
- Players
- 0
Crouzeix's conjecture is a problem in matrix analysis proposed by Michel Crouzeix in 2004, and it can be stated as follows: ‖ f ( A ) ‖ ≤ 2 sup z ∈ W ( A ) | f ( z ) | , {\displaystyle \|f(A)\|\leq 2\sup _{z\in W(A)}|f(z)|,} where the set W ( A ) {\displaystyle W(A)} is the field of values of a n×n…
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