matter point of a problem
41Horizon problem — The horizon problem is a problem with the standard cosmological model of the Big Bang which was identified in the 1970s. It points out that different regions of the universe have not contacted each other due to the great distances between them,… …
42Road coloring problem — In graph theory the road coloring theorem, known until recently as the road coloring conjecture, deals with synchronized instructions. The issue involves whether by using such instructions, one can reach or locate an object or destination from… …
43Wikipedia:Neutral point of view — Wikipedia:Point of view redirects here. For the essay on how to describe points of view, see Wikipedia:Describing points of view. To raise issues with specific articles, see the NPOV noticeboard. For advice on applying this policy, see the NPOV… …
44Apache Point Observatory Lunar Laser-ranging Operation — APOLLO shooting a laser at the Moon. The laser pulse is reflected from the retroreflectors on the Moon (see below) and returned to the telescope. The round trip time tells the distance to the Moon to great accuracy. In this picture the Moon is… …
45Patentable subject matter — Patent law (patents for inventions) …
46Wikipedia:Do not disrupt Wikipedia to illustrate a point — This page documents an English Wikipedia behavioral guideline. It is a generally accepted standard that editors should attempt to follow, though it is best treated with common sense, and occasional exceptions may apply. Any substantive edit to… …
47Stefan problem — In mathematics and its applications, particularly to phase transitions in matter, a Stefan problem (also Stefan task) is a particular kind of boundary value problem for a partial differential equation (PDE), adapted to the case in which a phase… …
48Mind–body problem — René Descartes illustration of mind/body dualism. Inputs are passed on by the sensory organs to the epiphysis in the brain and from there to the immaterial spirit …
49Merton's portfolio problem — is a well known problem in continuous time finance. An investor with a finite lifetime must choose how much to consume and must allocate his wealth between stocks and a risk free asset so as to maximize expected lifetime utility. The problem was… …
50Subject-object problem — issues tone=December 2007 confusing=September 2008 unbalanced=July 2008 refimprove=July 2008 The subject object problem is a longstanding philosophical issue. It arises from the notion that the world consists of objects (what is observed) which… …
