Robin Leroy

Exception for some class hierarchies with no member variables and only static member functions, where no objects of those types are declared. Example: the `Serializer`s, `DoubleOrQuantityOrMultivectorSerializer` etc.

The ugliness of the above exceptions could be eliminated by giving them, or making them inherit, a deleted destructor; the rule would then be "one of final, virtual destructor, deleted...

##### Decision. A `class` or `struct` must have one of - the *class-virt-specifier* `final`; - a virtual destructor (possibly inherited); - a deleted destructor (possibly inherited). Omit unneeded default destructors...

The solution of #96 proved unsatisfactory, since we would end up relying on using-declarations made in `principia` from other files, which made things dependent on inclusion order and caused [conficts](https://github.com/mockingbirdnest/Principia/blob/ba191b1920de91d1e8b7426545f54a875d8ece37/physics/discrete_trajectory_test.cpp#L39-L40)....

> We could modify UTS 35 to add anything else we need for it to be a superset (sign handling and maybe NaN/Inf) Assuming we punt on FixedDecimal NaN and...

Having discussed this with @sffc last week, we found a couple of issues with putting exponents (of both the scientific and the compact kind) in `FixedDecimal`: - There is no...

@sffc > Is there anything left on this ticket? Adding `CompactDecimal` and `ScientificDecimal` probably fits into the original scope of this issue (which saw that as an extension to `FixedDecimal`...

https://github.com/mockingbirdnest/styleguide/commit/79cb6eed4728321e4443f8bb019ba718aec06213. Apparently we are 368 commits behind, but at least it works with Python 3.

Update: The equipotentials move too much in all our current frames to be of any practical use, and would thus only clutter and confuse. In particular, in the MEO frame,...

> It may be time to seriously look into the long-discussed rotating-pulsating frame, wherein the potential should look much the same, but the Lagrange points don’t move. Indeed, while the...