SCP-033

SCP-033 is an entry on the SCP Foundation Wiki which describes an as-of-yet unknown integer that is described by a set of mathematical equations ranging from the mediocre to the fiendishly abstruse, and which was designated by the fictitious Professor Hutchinson as $$\Theta '$$. It is a number that cannot remain fixed in our reality, and seeks to 'fade away' from any surface upon the description of it is written.

It is approximately between █ and █, according to the Wiki. The number is fictitious of course, but it provides insight as to how mathematicians might have felt about the introduction of the imaginary value $$i$$ within mathematics, which is a number that likewise cannot be said to truly "exist" in our reality, (in the sense a representation of it cannot be produced, unlike how the naturals may be symbolized by a grouping of various objects), but has a firm hold on the calculation of very real and tangible matters, such as the trajectory of a cannon ball.