Whither existence theory?

References

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• 26 The reader is referred to Ref. [6], for a thoughtful discussion of the distinction between invertibility in the settheoretic sense, i.e. bijectivity, and invertibility as an operator having a bounded inverse
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• Lp ((O,τ);H) is the Banach space of strongly measurable functions f:(O,τ) → H satisfying ‖f(.) ‖H ε Lp(O,τ), endowed with the Lp-norm. The integral in Eq. (6) is to be interpreted as a Bochner integral
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