From Catherine Asaro’s The Spacetime Pool :
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She gaped at him. “Do you mean a Riemann sheet? A branch cut from one Riemann sheet to another?” “That’s right.” He hesitated. “You know these words?” She laughed unsteadily. “It’s nonsense. Not the sheets, I mean, but they’re just mathematical constructs! They don’t actually exist. You can’t physically go through a branch cut any more than you could step into a square root sign.” |