I love you.

You are my necessary and sufficient condition.

I can't be excluded without you. ? I can't push you out without me. ?

So we live together! ?

I love you.

I need you in my life.

Without you, my life will always be an empty set. ?

I love you.

You are my axis of symmetry. ?

Without you, I will never find my other half. ?

I love you.

You are my territory.

My function is meaningless without you. ?

I love you.

Extended data:

1805 The word "because" was first used in The Gentleman's Mathematical Companion published in Britain, but it did not catch on.

By 1827, Euclid's Elements of Geometry published by Cambridge University used ⊙ for "because" and ∴ for "so" respectively. This usage has become more and more popular and has been used ever since. Be sure to remember: you can't use ∵ instead of ∵ in the topic, remember.

The knowledge and application of basic mathematics is an indispensable part of individual and group life. The refinement of its basic concepts can be found in ancient mathematical documents of ancient Egypt, Mesopotamia and ancient India. Since then, its development has made small progress, but algebra and geometry at that time were still in an independent state for a long time.

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