Oh, yeah, and note that if you solve the time dilation equation Neil’s put up there for v > c, it produces not a negative number (time flowing backwards) but the square root of a negative number, which is an imaginary number. If that works like imaginary numbers do in, say, the electrical equations, it means time flowing at an angle to the base timeline. Not parallel timelines, but perpendicular ones.
Oh, yeah, and note that if you solve the time dilation equation Neil’s put up there for v > c, it produces not a negative number (time flowing backwards) but the square root of a negative number, which is an imaginary number. If that works like imaginary numbers do in, say, the electrical equations, it means time flowing at an angle to the base timeline. Not parallel timelines, but perpendicular ones.