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cs.CG2010★ 1 cited
Generalized Semimagic Squares for Digital Halftoning
Akitoshi Kawamura
Completing Aronov et al.'s study on zero-discrepancy matrices for digital halftoning, we determine all (m, n, k, l) for which it is possible to put mn consecutive integers on an m-…
cs.CC2010★ 40 cited
Lipschitz Continuous Ordinary Differential Equations are Polynomial-Space Complete
Akitoshi Kawamura
In answer to Ko's question raised in 1983, we show that an initial value problem given by a polynomial-time computable, Lipschitz continuous function can have a polynomial-space co…