Monsters Need Love Too (怪物也需要愛)

f₁(x,y) > 0

f_c(x,y) > 0,  c = 0.3 ~ 1

( Mathematical software used: UDAV )

Making Love ♥

Linear Combination of Spirographs
(Hypotrochoid and Epitrochoid)

( Mathematical software used: GeoGebra )

When Sine Met Line (當正弦遇上直線)

Sine met Line in the Hexagon Park last night.

They fell in love at first sight.

Sine is so beautiful even when she twists her body.

Line is so straight even when he relaxes his mind.

They danced together and had a good time.

They felt it was time to tie the knot.

What a colorful night!

( Mathematical software used: GeoGebra )