The virtual-casing principle and Helmholtz’s theorem

the survey of the virtual higher education in iran and the ways of its development and improvement

این پژوهش با هدف "بررسی وضعیت موجود آموزش عالی مجازی در ایران و راههای توسعه و ارتقای آن " و با روش توصیفی-تحلیلی و پیمایشی صورت پذیرفته است. بررسی اسنادو مدارک موجود در زمینه آموزش مجازی نشان داد تعداد دانشجویان و مقاطع تحصیلی و رشته محل های دوره های الکترونیکی چندان مطلوب نبوده و از نظر کیفی نیز وضعیت شاخص خدمات آموزشی اساتید و وضعیت شبکه اینترنت در محیط آموزش مجازی نامطلوب است.

Harsanyi’s theorem without the sure-thing principle

We study a version of Harsanyi’s theorem (Harsanyi, 1955) in a framework involving uncertainty. Without assuming the sure-thing principle but sticking to consequentialism, we obtain that a Paretian social aggregation should be affine and that all decision makers must use additively separable preferences that resembles expected utilities. Whenever preferences are state independent, we find that ...

Plasma Physics and Controlled Fusion

The virtual-casing principle is used in plasma physics to convert a Biot–Savart integration over a current distribution into a surface integral over a surface that encloses the current. In many circumstances, use of virtual casing can significantly speed up the computation of magnetic fields. In this paper, a virtual-casing principle is derived for a general vector field with arbitrary divergen...

The Resolution Principle in Theorem-proving

Ramsey's Theorem and the Pigeonhole Principle in Intuitionistic Mathematics

At first sight, the argument which F. P. Ramsey gave for (the infinite case of) his famous theorem from 1927, is hopelessly unconstructive. If suitably reformulated, the theorem is true intuitionistically as well as classically: we offer a proof which should convince both the classical and the intuitionistic reader.