to Graph Pebbling and Rubbling.
Nandor Sieben (Northern Arizona University)
Models of Discrete Conformal Geometry.
William E. Wood (University of Northern
Groups and Primitivity of their Group Rings.
Tsunekaze Nishinaka (University of Hyogo)
Multiplicative Sets of Idempotents in a
Yasuyuki Hirano (Naruto University of
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