It means that they are continuous in both directions
Sizing Handle
A double headed arrow will display when the mouse cursor is pointed over a window or an object that can be resized. This is usually the edge or corner of a window. The arrow can be vertical or horizontal and is used to drag the object to increase or decrease its size.
An arrow typically exhibits reflectional symmetry, also known as mirror symmetry. This means that if you were to draw a line down the center of the arrow, the two halves would be mirror images of each other. Arrows do not usually have rotational symmetry, as rotating them around a point would not result in the same shape.
== == It means 'implies'. So A --> B means 'if A is true then B is true' or 'A implies B'
You have to press the middle button that has the arrow and the two lines.
array
Yes,there is a two headed calf.
Two Headed was created in 1995.
two headed snake
the camshaft timing mark is on plastic surround toright of pulley,looks like an arrow it lines up with two protruding edges on pulley,the crankshaft has a little arrow stamped into it,which lines up with special locking tool from skoda
Well, hello there! An arrow typically has three vertices - one at the tip of the arrow and two at the base where the arrowhead meets the shaft. Isn't that just delightful? Remember, there are no mistakes in art, just happy little accidents.
The Two Headed Freap was created in 1972.