# Promote/widen numerical types under +, \*, sqrt, log

**URL:** <https://discourse.julialang.org/t/promote-widen-numerical-types-under-sqrt-log/8137>\
**Category:** General Usage\
**Tags:** question\
**Created:** [January 3, 2018, 6:21pm UTC](https://discourse.julialang.org/t/promote-widen-numerical-types-under-sqrt-log/8137 "2018-01-03T18:21:40Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![rdeits](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/rdeits/32/286_2.png) [@rdeits](https://discourse.julialang.org/u/rdeits)\
**Post date:** [January 3, 2018, 7:44pm UTC](https://discourse.julialang.org/t/promote-widen-numerical-types-under-sqrt-log/8137/7 "2018-01-03T19:44:09Z")

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Potentially relevant: [Ridiculous idea: types from the future](https://discourse.julialang.org/t/ridiculous-idea-types-from-the-future/5457) (in which the easiest suggestion turned out be letting `map` do all the hard work of figuring out a nice stable return type).

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_[View the full topic](https://discourse.julialang.org/t/promote-widen-numerical-types-under-sqrt-log/8137)._