Sentence examples for proof is easy from inspiring English sources

The proof is easy.

The proof is easy and so omitted.

The proof is easy and omitted here.

The proof is easy and therefore is omitted.

The proof is easy and will be omitted.

The proof is easy to obtain and therefore omitted.

These examples are probably known in functional analysis courses; however, we shall include them here for convenience, and there proofs are easy and hence are omitted.

Proof It is easy and omitted.

Proof It is easy to deduce that.

Proof It is easy to check that (P1) holds.

Proof It is easy to see that (2.3) implies (iii).