A constructive proof of the composition rule for Taylor's functional calculus

Taylor Functional Calculus

“…It is clear from the Stokes theorem that the definition of f (A)x does not depend on the choice of function ϕ and, by (6), it is independent of ∆.…”

On the Taylor functional calculus

“…It is clear from the Stokes theorem that the definition of f (A)x does not depend on the choice of the function ϕ and, by (6), it is independent of ∆.…”