#### Mathematical English Usage - a Dictionary

##### by Jerzy Trzeciak

## half

**1**

We sketch the proof of the easy half of the theorem.

This proves one half of (2); the other half is a matter of direct
computation.

the left half of the interval

the upper half of the unit disc

Thus F is greater by a half.

**2**

F is half the sum of the positive roots. [*Or*: half of the
sum]

Half of the sets of R miss i and half the remaining miss j.

Then J contains an interval of half its length in which f is positive.

On average, about half the list will be tested.

Now F is half as long as G. [*Or*: as G is]

We divide N in half.

The length of F is thus reduced by half.

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