[Love Letter from a Mathematics Teacher] This article is a romantic love letter written by a mathematics teacher from Tsinghua University! It covers all high school math! One word "absolute"! Two words "classic"! Four words: "I admire you so much"! I hope everyone will leave their own handwriting!
Our heart is a circle,
because its eccentricity is always zero.
My thoughts about you are like a recurring decimal,
over and over again, stubbornly.
We are the parabola, you are the focus and I am the direct line,
The more deeply you miss me, the more truly I miss you.
The zero vector can have many directions, but only one length.
Just like me, I can have many friends, but there is only one you, worthy of my protection.
Life can be sweet or bitter, but it cannot be boring without you.
Just like the denominator, it can be positive or negative, but it cannot be meaningless and has a value of zero.
With you, my world is infinite,
\Because no real number can express my deep love for you.
My feelings for you are like an exponential function with the natural logarithm e as the base. No matter how many winds and rains it has gone through, it still remains true to its true nature, and my true love will remain forever.
No matter what kind of random variables we have in front of us, no matter how big the variance is in the future, I believe that after the trough is passed, will the peak be far away?
Your life is my domain of definition, your thoughts are my corresponding rules,
Your smile is the necessary and sufficient condition for my existence here.
If your heart is the x-axis, then I am a sine function, rotating around you, contracting and releasing.
If my heart is the x-axis, then you are a parabola with an upward opening and a negative Δ, and you will always be in my heart.
The surprises and hopes I bring to you every day are like every element in an infinite set, although it is inexhaustible, it is different.
If one day we are on both sides of the earth, so close to each other,
Then I will definitely come to you along the great circle that passes through the center of the earth, even if I have to crawl.
If one day we live on opposite ends of a straight line,
then I will definitely cross the barriers of time and space, draw a common vertical line and rush towards you, not willing to stay for a moment.
But if one day, unfortunately, we are thrown by God to the two ends of the number line, plus and minus are infinite, life and death are separated,
It doesn't matter, just ask for a reciprocal, we can be heart-to-heart and stay together forever.
Lover is so mysterious, yet so wonderful
