Errata

P. 366, last line, for f $ ( x ) read f − ( x ). P. 367, relation 4, for x 1 − x read x 1 $ h 1 − x . P. 371, line 4, add “By Theorem 1, removing a sub‐set of content zero, we ensure that f − ( x ) and f − ( x ) are also finite.” P. 371 line 5, after f $ ( x ) add “ f − ( x ), f − ( x ).” P. 371 line 8. after “is,” add “when we replace the sub‐set of content zero.” P. 371 line 16, add 0 < f − ( x ) ⩽ f − ( x ) < A . P. 371 line 25, insert first f − ( x ) < A , and insert last f − ( x ) > 0 . P. 371 lines 4 and 5 from bottom, change $ into ± (twice). P. 372, delete lines 10 and 11 from bottom up to the full stop. P. 373, line 9, change “the right‐hand” into “one.”