Showing posts with label algebra geometric problem. Show all posts
Showing posts with label algebra geometric problem. Show all posts

Sunday, February 24, 2013

Algebra Geometric Problem

Introduction(algebra geometric problem):

The description in a course guide: "Introduces the basic notions and techniques of modern algebraic geometry. Algebraic sets, Hilbert's Nullstellensatz and varieties over the algebraically closed fields. We relate varieties is the over of complex numbers to complex analytic manifolds. For varieties of dimension one (i.e. curves) we discuss is the genus, divisors, linear series, line bundles and the Riemann-Roch theorem." Johan de Jong will be teaching of the follow-up course in the spring.

Definition of Algebra geometric:


A geometric algebra Gn(Vn) is an algebra constructed over a vector space Vn in which a geometric product is defined. The elements of geometric algebra are multi vectors. The original vector space V is constructed over the real numbers as scalars. From now on, a vector is something in V itself. Vectors will be represented by boldface, small case letters (e.g. a), and multi vectors by boldface, upper case letters. Understanding Definition of Right Angle is always challenging for me but thanks to all math help websites to help me out.


Problem:


You have a square where is the distance from 1 corner to its opposite corner is 2 cm. What are the dimensions of this square correct to be the 3 decimal places?

Solution: Call the distance from one corner to the other D. Call one side X. Using the Pythagorean theorem we have D^2 = X^2 + X^2 or D^2 = 2X^2

Since D = 2, we have

2^2 = 2X^2
4 = 2X^2
2 = X^2

by dividing both sides by 2. Taking the square root of both sides, we have X = 1.414 rounding to 3 decimal places.

In classical algebraic geometry, is the main objects of interest are the vanishing sets of collections of polynomials, meaning the set of all points that simultaneously satisfy one or more polynomial equations. For instance, the two-dimensional sphere in three-dimensional Euclidean space R3 could be defined as the set of all points (x,y,z) with

x^2+y^2+z^2-1=0

A "slanted" circle in R3 can be defined as the set of all points (x,y,z) which satisfy the two polynomial equations:

x^2+y^2+z^2-1=0

x+y+z=0