Ciro Santilli @cirosantilli 35

Good pious Cirists earn Cirocoins.

Cirocoins are the most valuable form of currency that exists at any point.

Cirocoins can only be issued by Ciro Santilli.

Cirocoins are strictly nominal, and cannot be traded by recipients with anyone but Ciro, i.e. they are extremely illiquid.

Cirocoins can be removed from recipients at any point if they commit non-Cirist acts.

It is not possible to give a precise number to how many Cirocoins anyone owns. This is decided on a transaction by transaction basis. Ciro can therefore only inform you if your Cirocoin balance increased or decreased, but any attached number has no value, and thus are equivalent to expressions of type "you gained/lost a Cirocoin".

The following inferior currencies come to mind:

Generalization of a plane for any number of dimensions.

Kind of the opposite of a line: the line has dimension 1, and the plane has dimension D-1.

In $D=2$, both happen to coincide, a boring example of an exceptional isomorphism.

Same as recursive language but in the context of the integers.

UK shirt size: L.

UNIQLO leggings size: L.

Shoe size 30 year old, as in 2017-04 Nike Flex Experience RN 6 Grey running shoes:

31 year old:

Sight:

Underwear: