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23 Cards in this Set

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Neither surjective nor injective
What kind of mapping is this?
Bijection
What kind of mapping is this?
Bijection
What kind of mapping is this?
Injection or one-to-one
What kind of mapping is this?
Injection or one-to-one
What kind of mapping is this?
Neither injection nor surjection
What kind of mapping is this?
Surjection or onto
What kind of mapping is this?
Surjection or onto
What kind of mapping is this?
Another name for surjection
onto
Another name for onto
surjection
Another name for injective
one-to-one
Another name for one-to-one
Injective
How many fixed points does a rotation have?
One
How many fixed points does a translation have?
None
How many fixed points does a glide have?
None
How many fixed points does a reflection have?
An infinite number of fixed points (those on the line we are reflecting over).
Which isometries preserve orientation?
Rotation and translation
Which isometries reverse orientation?
Glide and reflection.
Equilateral
Isosceles, scalene or equilateral?
Isoceles
Isosceles, scalene or equilateral?
Scalene
Isosceles, scalene or equilateral?
Define surjection
For every y in the codomain Y there is at least one x in the domain X with f(x) = y.
Surge covers all - every y has an x
Define injection
For every y in the codomain Y, there is at most one x in the domain X with f(x) = y.
Two don't map to one - can't inject the same piece of skin with two needles at the same time.