# Why do \`A\_mul\_Bc\` and \`A\_mul\_Bt\` belong to \`Base\`, while \`A\_mul\_B!\` lives in Base.LinAlg?

**URL:** <https://discourse.julialang.org/t/why-do-a-mul-bc-and-a-mul-bt-belong-to-base-while-a-mul-b-lives-in-base-linalg/7757>\
**Category:** New to Julia\
**Tags:** question\
**Created:** [December 14, 2017, 5:43am UTC](https://discourse.julialang.org/t/why-do-a-mul-bc-and-a-mul-bt-belong-to-base-while-a-mul-b-lives-in-base-linalg/7757 "2017-12-14T05:43:27Z")\
**Posts on this page:** 1\
**Showing post:** 9

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**Author:** ![mauro3](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/mauro3/32/292_2.png) [@mauro3](https://discourse.julialang.org/u/mauro3)\
**Post date:** [December 14, 2017, 9:38pm UTC](https://discourse.julialang.org/t/why-do-a-mul-bc-and-a-mul-bt-belong-to-base-while-a-mul-b-lives-in-base-linalg/7757/9 "2017-12-14T21:38:05Z")

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Don’t know. Feature freeze should be tomorrow: [1.0 Feature Freeze Dec 15th](https://discourse.julialang.org/t/1-0-feature-freeze-dec-15th/7209)

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