• m_fA
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    6 hours ago

    This doesn’t directly answer your question, but things would probably get very weird compared to our universe. Here’s an interactive visualization of a different weird universe with two time dimensions, Dichronauts by Greg Egan:

    https://www.gregegan.net/DICHRONAUTS/02/Interactive.html

    He really goes through the math on that site, so you might get some insight into how other topologies would look