[see also: common, customary, familiar, usual
Using the standard inner product we can identify H with H*.
The standard proofs proceed via the Cauchy formula.
A standard verification shows that......
It is a standard fact that......
Let us sketch the proof of the first estimate, which is a variation of standard arguments.
But the Tn need not be contractions in L1, which is the main obstruction to applying standard arguments for densities.
Although standard, the notion of a virtual vector bundle is not particularly well known.