wielandt inequality
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2017 ◽  
Vol 66 (8) ◽  
pp. 1564-1577 ◽  
Author(s):  
Masayuki Fujimoto ◽  
Yuki Seo

2015 ◽  
Vol 30 ◽  
pp. 577-584
Author(s):  
Pingping Zhang

Let A be a positive operator on a Hilbert space H with 0 < m ≤ A ≤ M, and let X and Y be isometries on H such that X*Y = 0, p > 0, and Φ be a 2-positive unital linear map. Define Γ = (Φ(X*AY )Φ(Y*AY )^(−1)Φ(Y*AX)^p Φ(X*AX)^(−p). Several upper bounds for (1/2) |Γ + Γ*| are established. These bounds complement a recent result on the operator Wielandt inequality.


1999 ◽  
Vol 44 (2) ◽  
pp. 118-120
Author(s):  
Songguil Wang ◽  
Ip Wai-Cheung

1994 ◽  
Vol 104 (3) ◽  
pp. 483-494 ◽  
Author(s):  
Rajendra Bhatia ◽  
Ludwig Elsner

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