Actually the G displayed different when I typed it from how it looked on the keyboard so, depending on how the font gets rendered, some of those may be off. In this case the little “leg” on the right side of the G changes the topology enough to make this version of G not topologically equivalent to the others.
Topology: the study of connection patterns.
The donut is topologically equivalent to the mug.
1, 2, 3, 5, & 7 are all topologically equivalent to one another as symbols. Those numerals are all topologically equivalent to the capital letters U, I, L, M, N, V, C, Z, J, G, S, and W.

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