Search found 94 matches

by MJK
Tue Jul 22, 2014 6:42 pm
Forum: Teachers/Club Leaders
Topic: Failure of free club culture
Replies: 96
Views: 79525

Re: Failure of free club culture

...
They're more studious and respect the idea there could be a fast lane to mastery, which may not be to their spontaneous liking. Whether their genes or culture is the primary cause for this, I cannot tell.
I tried my best to just, go to sleep, but this sentence somehow hit my mind so hard that ...
by MJK
Fri Jun 20, 2014 4:45 am
Forum: General Go Chat
Topic: Knights move?
Replies: 14
Views: 6646

Re: Knights move?

Japan is sure part of the (far) east. It is located in the east of Eurasia; the American continent was unknown in the mainstream history for a very long time.

The original question was, how the knight's move is called in the 'east', not in Japan.

Your answer 'It is called keima (in the east)' was ...
by MJK
Thu Jun 19, 2014 5:45 pm
Forum: General Go Chat
Topic: Knights move?
Replies: 14
Views: 6646

Re: Knights move?

Unusedname wrote:http://senseis.xmp.net/?Keima

It's called a keima. I prefer knights move. :)

Japan is not 'East', neither 'East Asia'
by MJK
Thu Jun 19, 2014 5:44 pm
Forum: General Go Chat
Topic: Knights move?
Replies: 14
Views: 6646

Re: Knights move?

Just curious, do they call it a knight's move in the east? I doubt it seeing as it refers to chess and so it seems like an American go term.
In Korea, it is called 날일자행마(Narilja-haengma) or just 날일자(Narilja). It means to move as the Chinese charactor 日 (see the squares as on the go board). In the ...
by MJK
Sun Jun 15, 2014 2:58 am
Forum: Off Topic
Topic: Combinatorics
Replies: 8
Views: 6451

Re: Combinatorics

schawipp wrote:Just a question on the syntax - does nCk stand for the number of combinations, where k elements are selected out of n (i.e. n!/(k!(n-k)!)?

Sure, as you can see in the code.
by MJK
Sun Jun 15, 2014 2:32 am
Forum: Off Topic
Topic: Combinatorics
Replies: 8
Views: 6451

Combinatorics

I'm quite sorry to keep using this forum this way.. but I just feel so uncomfortable unanswered, so.

6236754_1402771389.jpg
This is everything.

Mathics, a freeware alternative to Mathematica, claims the above true.

(Input)
C := (#1)!/((#2)!*(#1-#2)!) &
Sum[C[n, k], {k, 0, s-1 ...
by MJK
Sun May 25, 2014 7:20 am
Forum: Computer Go
Topic: Virtual Machine
Replies: 29
Views: 17803

Re: Virtual Machine

How about this. Let me make a suggestion.

1. Not every single file in your computer needs to be protected or be unseen by others.
2. Suppose there is an important text file 'haha.txt' which has your bank card PIN number and email password written down.
3. You don't want others to be able to access ...
by MJK
Sat May 24, 2014 6:18 am
Forum: Off Topic
Topic: unsolvable (math) problem for a whole year, help me!
Replies: 34
Views: 17486

Re: unsolvable (math) problem for a whole year, help me!

Yes I am trying to clearly define a set of a five-dimensional space.

As RBerenguel pointed out, it is currently not well defined.

I will need to think more to do this.

Perhaps some clues of the properties of set X will occur after being clearly defined.
by MJK
Sat May 24, 2014 5:33 am
Forum: Off Topic
Topic: unsolvable (math) problem for a whole year, help me!
Replies: 34
Views: 17486

Re: unsolvable (math) problem for a whole year, help me!

And in his example the intervall A/3<A+B<-A/2 is empty (if A is positive). I'm pretty sure, the misunderstanding lies here.
The interval is not empty, and n({(A, B)|A/3 < A+B < -A/2}) = ∞
(n(X) means number of the elements of set X)
I never stated the numbers should be positive but rather {A, B ...
by MJK
Sat May 24, 2014 5:08 am
Forum: Off Topic
Topic: unsolvable (math) problem for a whole year, help me!
Replies: 34
Views: 17486

Re: unsolvable (math) problem for a whole year, help me!

You are confusing yourself because you did not word your problem correctly to yourself.

Is the following implication true FOR EVERY 5-tuple (a1,a2,b1,b2,x) of real numbers?

If (a1<x<a2 if-and-only-if b1<x<b2) then (a1=b1 AND a2=b2)

To disprove it, you need to find that FOR SOME 5-tuple (a1,a2 ...
by MJK
Fri May 23, 2014 6:25 pm
Forum: Off Topic
Topic: unsolvable (math) problem for a whole year, help me!
Replies: 34
Views: 17486

Re: unsolvable (math) problem for a whole year, help me!

Let me make things clear...

First, I am still not much familiar with math in English. What I meant by 'given' is actually 'in a situation that', so 'when' I think is a better word there.

So here is (probably) the final version of this problem.

Prove that below is not true&#46;

when,
{a, b, c, d ...
by MJK
Fri May 23, 2014 6:03 pm
Forum: Off Topic
Topic: unsolvable (math) problem for a whole year, help me!
Replies: 34
Views: 17486

Re: Re:

DrStraw wrote:......

Code: Select all

Prove that below is not true.

given,
{a, b, c, d, X} ⊂ {x|x is a real number}
a<X<b <=> c<X<d

then,
a=c and b=d
by MJK
Fri May 23, 2014 5:27 pm
Forum: Off Topic
Topic: unsolvable (math) problem for a whole year, help me!
Replies: 34
Views: 17486

Re:

MJK, just curious: what's the background of this question ? Are you trying to understand it for fun ?
Or, is it a homework assignment ?

If it's homework, which school level ? Which subject ? (Mathematics, or physics, or something else, like economics ? )
Background is a situation I faced during ...
by MJK
Fri May 23, 2014 5:05 pm
Forum: Off Topic
Topic: unsolvable (math) problem for a whole year, help me!
Replies: 34
Views: 17486

Re: unsolvable (math) problem for a whole year, help me!

My question can be summarized as,

Code: Select all

What is the error of generalizing that,

given,
{a, b, c, d, X} ⊂ {x|x is a real number}
a<X<b <=> c<X<d

then,
a=c and b=d

?
by MJK
Fri May 23, 2014 4:52 pm
Forum: Off Topic
Topic: unsolvable (math) problem for a whole year, help me!
Replies: 34
Views: 17486

Re: unsolvable (math) problem for a whole year, help me!

The thing is, inequalities don't work like this. Even though a+b (alpha+beta) satisfy these two inequalities, it doesn't mean the extremes have to coincide. You wouldn't say:

5<d<7
2<d<9

And conclude that 5=2 and 7=9.
Thank you for your such long reply with iPad.

But in your example
5<d<7 ...