--- Introduction ---

What is the nature of
?

What is the cardinal of the image of
?

Give an element having several inverse images.

Give an element having several images.

Give an element without inverse image.

Give an element without image.

What is the image of
?

What is the inverse image of the subset {}?

**Help**. Enter `-1` if the asked elements do not exist.

What is the nature of
?

What is the cardinal of the image of
?

Give an element having several inverse images.

Give an element having several images.

Give an element without inverse image.

Give an element without image.

What is the image of
?

What is the inverse image of the subset {}?

**Help**. Enter `-1` if the asked elements do not exist.

What is the nature of
?

What is the cardinal of the image of
?

Give an element having several inverse images.

Give an element having several images.

Give an element without inverse image.

Give an element without image.

What is the image of
?

What is the inverse image of the subset {}?

**Help**. Enter `-1` if the asked elements do not exist.

What is the cardinal of the image of
?

Give an element having several inverse images.

Give an element having several images.

Give an element without inverse image.

Give an element without image.

What is the image of
?

What is the inverse image of the subset {}?

**Help**. Enter `-1` if the asked elements do not exist.

What is the cardinal of the image of
?

Give an element having several inverse images.

Give an element having several images.

Give an element without inverse image.

Give an element without image.

What is the image of
?

What is the inverse image of the subset {}?

**Help**. Enter `-1` if the asked elements do not exist.

What is the cardinal of the image of
?

Give an element having several inverse images.

Give an element having several images.

Give an element without inverse image.

Give an element without image.

What is the image of
?

What is the inverse image of the subset {}?

**Help**. Enter `-1` if the asked elements do not exist.

What is the cardinal of the image of
?

Give an element having several inverse images.

Give an element having several images.

Give an element without inverse image.

Give an element without image.

What is the image of
?

What is the inverse image of the subset {}?

**Help**. Enter `-1` if the asked elements do not exist.

What is the cardinal of the image of
?

Give an element having several inverse images.

Give an element having several images.

Give an element without inverse image.

Give an element without image.

What is the image of
?

What is the inverse image of the subset {}?

**Help**. Enter `-1` if the asked elements do not exist.

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Description: collection of exercises on maps between finite sets. interactive exercises, online calculators and plotters, mathematical recreation and games

Keywords: interactive mathematics, interactive math, server side interactivity, algebra, set, arithmetic, set, finite set, map, surjective, injective, bijective, surjectivity, injectivity, bijectivity, image, inverse image