The U-Foes are a fictional supervillain team appearing in American comic books published by Marvel Comics. The group consists of four members: Vector, the group's leader who can repel matter telekinetically; Vapor, who can transform into any form of gaseous matter; X-Ray, who can generate and project radiation and fly; and Ironclad, who can transform into any metal form and control his density. They first appeared in The Incredible Hulk vol. 2 #254 (December 1980). As noted on the first page of that issue, the group's name was inspired by the 1979 Graham Parker song "Waiting for the UFOs".
Simon Utrecht, a former politician and multi-millionaire, funds an operation to gain superpowers the same way the Fantastic Four had, by flying into space and being exposed to cosmic rays. He chooses three other members to join him: Ann Darnell, Jimmy Darnell, and Mike Steel. What the group did not know was that they would be exposed to much higher amount than the Fantastic Four and that it would most likely kill them. The Hulk, in his Bruce Banner form, brings the ship down by reprogramming their computer before the group was exposed to the terminal levels of cosmic rays. The group did manage to gain powers and the newly christened U-Foes attacked Banner for interfering, convinced they could have become even more powerful without his intervention. Banner transforms into the Hulk and a fight ensues, but the U-Foes lose due to their inexperience with their newly gained powers and inability to fight as a team. Sometime later they escape from jail, and X-ray discoveres a way to keep Bruce Banner in his human form by generating 'anti-gamma rays'. Hulk is freed by his allies and defeats the team.
A vector in computing, specifically when talking about malicious code such as viruses or worms, is the method that this code uses to propagate itself or infect a computer. This sense is similar to, and derived from, its meaning in biology.
Some common vectors:
A vector space (also called a linear space) is a collection of objects called vectors, which may be added together and multiplied ("scaled") by numbers, called scalars in this context. Scalars are often taken to be real numbers, but there are also vector spaces with scalar multiplication by complex numbers, rational numbers, or generally any field. The operations of vector addition and scalar multiplication must satisfy certain requirements, called axioms, listed below.
Euclidean vectors are an example of a vector space. They represent physical quantities such as forces: any two forces (of the same type) can be added to yield a third, and the multiplication of a force vector by a real multiplier is another force vector. In the same vein, but in a more geometric sense, vectors representing displacements in the plane or in three-dimensional space also form vector spaces. Vectors in vector spaces do not necessarily have to be arrow-like objects as they appear in the mentioned examples: vectors are regarded as abstract mathematical objects with particular properties, which in some cases can be visualized as arrows.