f*i
14 楼
无理,但不知道是不是超越
l*3
21 楼
一个相关的猜想如下:
http://en.wikipedia.org/wiki/Schanuel's_conjecture
这问题我不懂.
我猜应该是无理数.
如果是有理数, 那意味着 pi 和 e 代数相关 (而且还他妈是一次幂), 你相信 Q(e)和
Q(pi) 是同一个东西吗? 我觉得不太可能.
【在 s**e 的大作中提到】
: π+e 是无理数吗?
http://en.wikipedia.org/wiki/Schanuel's_conjecture
这问题我不懂.
我猜应该是无理数.
如果是有理数, 那意味着 pi 和 e 代数相关 (而且还他妈是一次幂), 你相信 Q(e)和
Q(pi) 是同一个东西吗? 我觉得不太可能.
【在 s**e 的大作中提到】
: π+e 是无理数吗?
s*r
26 楼
The information you are talking about comes from Wolfram MathWorld. This is
a trusted site and is a great resource for Mathematics. I read it alot and
find it helpful.
This is the whole quote from the article:
"It is not known if pi+e, pi/e, or ln pi are irrational. However, it is
known that they cannot satisfy any polynomial equation of degree <=8 with
integer coefficients of average size 10^9"
Another quote is:
"At least one of pi×e and pi+e (and probably both) are transcendental, but
transcendence has not been proven for either number on its own. It is not
known if e^e, pi^pi, pi^e, gamma (the Euler-Mascheroni constant), I_0(2), or
I_1(2) (where I_n(x) is a modified Bessel function of the first kind) are
transcendental. "
For π+e to be a rational number, it would need to be expressable as a/b
where a and b are integers. Therefore π=a/b - e would need to be true. As
would e = a/b - π. You would need to prove that π and e are algebraically
independent to prove that π+e is irrational.
The irrational part has to cancel out for the sum to be rational.
Source(s):
Weisstein, Eric W. "Pi." From MathWorld--A Wolfram Web Resource. http://mathworld.wolfram.com/Pi.html
Weisstein, Eric W. "Transcendental Number." From MathWorld--A Wolfram Web
Resource. http://mathworld.wolfram.com/TranscendentalNumber.html
http://en.wikipedia.org/wiki/Algebraic_independence
a trusted site and is a great resource for Mathematics. I read it alot and
find it helpful.
This is the whole quote from the article:
"It is not known if pi+e, pi/e, or ln pi are irrational. However, it is
known that they cannot satisfy any polynomial equation of degree <=8 with
integer coefficients of average size 10^9"
Another quote is:
"At least one of pi×e and pi+e (and probably both) are transcendental, but
transcendence has not been proven for either number on its own. It is not
known if e^e, pi^pi, pi^e, gamma (the Euler-Mascheroni constant), I_0(2), or
I_1(2) (where I_n(x) is a modified Bessel function of the first kind) are
transcendental. "
For π+e to be a rational number, it would need to be expressable as a/b
where a and b are integers. Therefore π=a/b - e would need to be true. As
would e = a/b - π. You would need to prove that π and e are algebraically
independent to prove that π+e is irrational.
The irrational part has to cancel out for the sum to be rational.
Source(s):
Weisstein, Eric W. "Pi." From MathWorld--A Wolfram Web Resource. http://mathworld.wolfram.com/Pi.html
Weisstein, Eric W. "Transcendental Number." From MathWorld--A Wolfram Web
Resource. http://mathworld.wolfram.com/TranscendentalNumber.html
http://en.wikipedia.org/wiki/Algebraic_independence
C*r
30 楼
貌似e*pi和e^(pi^2)中至少有一个超越。
is
but
【在 s**********r 的大作中提到】
: The information you are talking about comes from Wolfram MathWorld. This is
: a trusted site and is a great resource for Mathematics. I read it alot and
: find it helpful.
: This is the whole quote from the article:
: "It is not known if pi+e, pi/e, or ln pi are irrational. However, it is
: known that they cannot satisfy any polynomial equation of degree <=8 with
: integer coefficients of average size 10^9"
: Another quote is:
: "At least one of pi×e and pi+e (and probably both) are transcendental, but
: transcendence has not been proven for either number on its own. It is not
is
but
【在 s**********r 的大作中提到】
: The information you are talking about comes from Wolfram MathWorld. This is
: a trusted site and is a great resource for Mathematics. I read it alot and
: find it helpful.
: This is the whole quote from the article:
: "It is not known if pi+e, pi/e, or ln pi are irrational. However, it is
: known that they cannot satisfy any polynomial equation of degree <=8 with
: integer coefficients of average size 10^9"
: Another quote is:
: "At least one of pi×e and pi+e (and probably both) are transcendental, but
: transcendence has not been proven for either number on its own. It is not
I*t
35 楼
别说有理还是无理了,人们甚至不知道pi^(pi^(pi^pi))是不是一个整数
m*x
40 楼
数学家还是有很多事情可以做的。有没有实用价值另说哈
h*d
43 楼
证明
http://mathforum.org/library/drmath/view/51617.html
【在 C**********r 的大作中提到】
: 貌似pi+e和pi*e中最多有一个可以有理
http://mathforum.org/library/drmath/view/51617.html
【在 C**********r 的大作中提到】
: 貌似pi+e和pi*e中最多有一个可以有理
C*r
44 楼
哈,我们偷看的是同一个页面诶。
【在 h*d 的大作中提到】
: 证明
: http://mathforum.org/library/drmath/view/51617.html
【在 h*d 的大作中提到】
: 证明
: http://mathforum.org/library/drmath/view/51617.html
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