Prof. F. G. Gregory, F.R.S.

Agnostic G Gregory Surfaces

We discuss G smoothness conditions for rectangular and triangular Gregory patches. We then incorporate these G conditions into a surface fitting algorithm. Knowledge of the patch type is inconsequential to the formulation of the G conditions, hence the term agnostic G Gregory surfaces.

Gregory G. Menshikov has turned 70

Professor Dr. Gregory Menshikov was born in St.Petersburg (then Leningrad) in 1931. His childhood was greatly affected by the Second World War. Like many other kids from Leningrad, Gregory was evacuated from the city to the Moscow region. After the war, he returned back, finished high school, and entered the Department of Mathematics and Mechanics of the Leningrad State University. In 1954, he ...

Héctor F . Calvo Pardo , Gregory Corcos and Emanuel

Firms need to incur substantial sunk costs to break in foreign markets, yet many give up exporting shortly after their first experience, which typically involves very small sales. Conversely, other new exporters shoot up their foreign sales and expand to new destinations. We investigate a simple theoretical mechanism that can rationalize these patterns. A firm discovers its profitability as an ...

f-DERIVATIONS AND (f; g)-DERIVATIONS OF MV -ALGEBRAS

Recently, the algebraic theory of MV -algebras is intensively studied. In this paper, we extend the concept of derivation of $MV$-algebras and we give someillustrative examples. Moreover, as a generalization of derivations of $MV$ -algebraswe introduce the notion of $f$-derivations and $(f; g)$-derivations of $MV$-algebras.Also, we investigate some properties of them.

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