Bernoulli distribution

We are back to civilized society, but this is heads or tails. This is gambling like stock market. The average line is 50%, so you have two choices which are up or down.

1 is head. 0 is tail.

P is probability.

If you have a die, probability of 1 is 1/6.

P(X=1)=1/6

0 is the other.

∴

P(X=0)=5/6

You have dice 10 times, and you get one 6 times.

P(X=6)=10C6*(1/6)^6*(5/6)^(10-6)≒0.2170635%

This is how many times you have 1 in 10 times.

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dice

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Binomial theorem

Orientalism is no formula. It is often mysticism of numbers. We can see algorism, but nobody knows where it comes from. Chinese blocks such as 一、二、三 are well known. Constructors gather and pile them. You still see their temples. Wood is vanishing ironically.

Polynomial keeps expanding, but there is a pattern. You keep adding numbers infinitely. We often see it naturally in the modern age.

x+y=1C0*x^0*y+1C1*x*y^0=x+y

(x+y)^2=2C0*x^0*y^2+2C1*x*y+2C2*x^2*y^0=x^2+2xy+y^2

(x+y)^3=3C0*x^0*y^3+3C1*x*y^2+3C2*x^2*y+3C3*x^3*y^0=x^3+3x*y^2+3x^2*y+y^3

(x+y)^4=4C0*x^0*y^4+4C1*x*y^3+4C2*x^2*y^2+4C3*x^3*y+4C4*x^4*y^0=x^4+4x*y^3+6x^2*y^2+4x^3*y+y^4

1	1
1	2	1
1	3	3	1
1	4	6	4	1

We know that this is convergence.

Pascal's triangle

I am a Japanese, so I am interested in mysterious something. AI still don't understand our consciousness. Future is uncertain, so you may change it. I am not so curious about it.

It is hard to read this Chinese character, but I try to translate it.

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B0
B0*2C0
B0*3C0+B1*3C1
B0*4C0+B1*4C1+B2*4C2
B0*5C0+B1*5C1+B2*5C2+B3*5C3
B0*6C0+B1*6C1+B2*6C2+B3*6C3+B4*6C4
B0*7C0+B1*7C1+B2*7C2+B3*7C3+B4*7C4+B5*7C5

1
1	3
1	4	6
1	5	10	10
1	6	15	20	15
1	7	21	35	35	21
B0	B1	B2	B3	B4	B5

B0=1, B1=-1/2 but 1/2, B2=1/6, B3=0, B4=-1/30, B5=0

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Now I see Bernoulli numbers in the Samurai era, although the country has been closed except for Holland and Portugal. We never know it in those days. Some Europeans may have taught us.

B6=1/42.

I clearly see it.

We don't understand the reason, but it seems to be Pascal's triangle.

N=6 and K=4

5C3=10

Then this samurai multiplies Bernoulli numbers apparently.

You sum the line between 1 and 0.

EX.
3/2+1/2=2
2+1=3
5/2+5/3-1/6=4
3+5/2-1/2=5
7/2+7/2-7/6+1/6=6
4+14/3-7/3+2/3=7
9/2+6-21/5+2-3/10=8
5+15/2-7+5-3/2=9
11/2+55/6-11+11-11/2+5/6=10
6+11-33/2+22-33/2+5=11

You get 1 to 11.

This is compression, and I try to find B12.

(13/2)+13+0-(143/6)+0+(286/7)+0-(429/10)+0+(65/3)+0+13B12=12

B12=-691/2730

Bernoulli number

Bernoulli numbers are almost the sum of k power.
Bn is the Bernoulli number. This is recurrence relation, so you change the direction back and forth.

You can also write this.

This is Maclaurin's expansion.
Then you can see this.

f(x)*(1/f(x))=1

This is convergence.

∴

from (2)

This is Binomial Coefficient.

∴

EX.
B0=1
B1=-1/2*(2C0)*B0=(-1/2)*1*1=-1/2
B2=-1/3*(3C0*B0+3C1B1)=(-1/3)*(-1/2)=1/6
B3=-1/4*(4C0*B0+4C1*B1+4C2*B2)=-1/4*(1-2+1)=0
B4=-1/5*(5C0*B0+5C1*B1+5C2*B2+5C3*B3)=(-1/5)*(1/6)=-1/30

All Bernoulli number is rational.
Bn is related to Riemann zeta function.

n→∞