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### Description
```
>>> import astropy.units as u
>>> Hz = u.def_unit('Hz', u.cycle / u.s)
>>> kHz = u.def_unit('kHz', 1000 * Hz)
>>> 1 * kHz == 1000 * Hz
True
>>> 1000 * Hz == 1 * kHz
False
…
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related doc: https://docs.google.com/document/d/1VZ64s2V47mJzXX4YBBTDN6jORu9XQKc6WFy3QeCdviU/edit
*Need to consider multi-beam during conversion.*
if the unit conversion is not frame-property d…
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`is_convertible_conversion_factor` is not about testing whether a `conversion_factor` is convertible to another, but whether their dimensions are the same, as suggested by [its implementation](https:/…
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If I have multiple uses of the same ingredient in the same recipe I'd prefer if the total was combined, perhaps with an optional "divided" annotation on the ingredient.
So, for example, if I have a…
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Example: microns and micrometers are the same thing: i.e. `Quantity(1, "micron") == Quantity(1, "micrometer")` because in the default registry configuration, there's the line `micron = micrometer`. Ho…
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Do we want to support these?
```.py
var.to(unit=None)
sc.to_unit(var, None)
```
They currently don't work. `to_unit` raises an exception but `to` does nothing because `None` is used to mean 'do n…
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A noisy test of Autoplot (https://cottagesystems.com/jenkins/job/autoplot-test005/18804/, 5th bookmark) showed where there's an instability in the Das2 code. The Units class builds up a table of conv…
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I am trying to export the output produced by our lab (Andre's) into the WCON format. I produce the following [test file](https://github.com/openworm/tracker-commons/files/450173/test.json.zip). I thin…
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### What is the problem this feature will solve?
Implementing type annotation in `utils` would be the proof-of-concept for larger adoption in other parts of this package (e.g., `units`). Type annotat…
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It would be nice to have a small switch at the top of the page allowing the user to toggle between technical and layperson displays. Differences would include:
1- graph (produced in R) would have dif…