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(1980)It is known that many decision problems are unsolvable in the class of all finitely presented groups. When the class of groups is restricted, problems previously unsolvable can become solvable. In this work we investigate ...
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(1968)
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(1988)In The Nature of Mathematical Knowledge (1984) Philip Kitcher develops an exciting and insightful picture of arithmetical reality by considering mathematical activitiesnot objectsas ontologically primitive. Yet, his ...
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(1992)A theory T admits elimination of imaginaries (EI) if every definable equivalence relation $\sim$ is the kernel of a definable map f. (I.e., $\vec{x}\sim\vec{y}\Longleftrightarrow f(\vec{x})=f(\vec{y}).)$ This term was ...
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(1987)Consider the second order nonlinear differential operator ${\cal L}y$ = Ly + $\eta y\sp3$, where $\eta$ = $\pm$1 and L, the linear part of ${\cal L}$, is of the form Ly = $y\sp{\prime\prime}$ + $p(x)y\sp\prime$ + q(x)y. ...
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(1977)
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(1970)
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(1996)A spherical code is a finite set of points on the surface of a multidimensional unit radius sphere. This thesis gives two constructions for large spherical codes that may be used for channel coding and for source coding. ...
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(1988)I consider algebraic relations between explicitly presented analytic functions with particular emphasis on Tarski's high school algebra problem.
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Now showing items 132151 of 757