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 tvinnbreytistærð (“complex variable”)
 tvinnfágað fall (“analytic function, complex analytic function, holomorphic function, regular analytic function”)
 tvinnfágað mynstur (“analytic structure, complex analytic structure, complex structure”)
 tvinnfágað rúm (“analytic space, complex analytic space, complex space”)
 tvinnfágaður (“analytic, complex analytic, holomorphic”)
 tvinnfáguð víðátta, tvinnvíðátta (“analytic manifold, complex analytic manifold, complex manifold”)
 tvinnfylki, tvinntalnafylki (“complex matrix”)
 tvinngildur, tvinntölugildur (“complex-valued”)
 tvinngilt fall, tvinntölugilt fall (“complex function, complex-valued function”)
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 tvinngreining (“complex analysis, function theory”)
 tvinnlínubundin (“complex line bundle”)
 tvinnlínulegt rúm, tvinnvigurrúm (“complex vector space”)
 tvinnslétta, tvinntalnaslétta (“Argand plane, complex number plane, Gaussian plane”)
 tvinnun (“complexification”)
 tvinnvarplína (“complex projective line”)
 tvinnvarprúm (“complex projective space”)
 tvinnvarpslétta (“complex projective plane”)
 tvinnþverstaðalgrúpa (“complex orthogonal group”)
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