# Why is \`copy(adjoint)\` not an adjoint object?

**URL:** https://discourse.julialang.org/t/why-is-copy-adjoint-not-an-adjoint-object/55371
**Category:** Internals & Design
**Tags:** column-major, row-major, adjoint, copy, deepcopy
**Created:** [February 16, 2021, 4:17am UTC](https://discourse.julialang.org/t/why-is-copy-adjoint-not-an-adjoint-object/55371 "2021-02-16T04:17:58Z")
**Posts on this page:** 1
**Showing post:** 6

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### Author: ![fph](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/fph/32/17159_2.png) [@fph](https://discourse.julialang.org/u/fph)
#### Post date: [February 16, 2021, 2:39pm UTC](https://discourse.julialang.org/t/why-is-copy-adjoint-not-an-adjoint-object/55371/6 "2021-02-16T14:39:50Z")

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This may be related to another thread of mine where I reported that adjointness ‘disappears’ after `abs.`: [How to write generic low-rank updates?](https://discourse.julialang.org/t/how-to-write-generic-low-rank-updates/46370)

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