Gottfrieb Plattner disappears after an explosion for nine days. Upon return, he recounts a strange tale of a parallel world. More mathematically interesting, he discovers that he is now left-handed, and his internal anatomy has apparently inverted left and right. This is attributed to the fourth-dimension."

This short story is about unexplicable but observed peculiarities in the main character, Plattner. His body organs are flipped and the extent of the math in the story is the explanation that it's impossible for that to happen if moving only in three dimensions. Just as we can flip a piece of paper (assuming it's 2-d) through three dimensions and reverse the picture, one can turn around in a fourth dimension and turn his insides about. Not much explanation is given, and readers are led to believe this is all occuring in a dream world. Also, curiously, eyes are mentioned many times through the story. This might have to do with the fact that the story is explained in terms of what Mr. Plattner saw. Overall there isn't much math in this story, but it's still one of the major ways to understand the story. So I gave it a 2 on mathematical content.

It plattner story is fantastic. does think a 4-dimensional universe with two distict torsion (left-handed and right-handed) that generates the connexion of space-time in continuos space-time each one with limit of speede that transform reflection from oriented to non-oriented through of reversion rotational( PARITY AND REVERSAL TIME) that defines slow down in time and contraction in rods.