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悠闲数学娱乐论坛(第3版)
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本论坛的 $\mathrm\LaTeX$ 公式的基本输入[2021-9-26更新]
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2
3
4
kuing
2013-6-14
64
60794
hbghlyj
2025-3-1 06:58
Hide sticky threads
本论坛的自定义命令[2016-4-5更新\edr...\endedr]
kuing
2013-6-14
22
14766
kuing
2022-11-13 12:28
Hide sticky threads
关于回帖的注意事项
kuing
2013-10-27
12
8976
hbghlyj
2025-2-24 05:41
two isomorphic $C(ℝ)$-modules whose presentation matrices are not equivalent
hbghlyj
2023-3-4
11
164
hbghlyj
2023-3-6 18:48
identification of polygons sides
hbghlyj
2023-2-23
7
295
Czhang271828
2023-6-1 16:34
[
几何
]
CMU Putnam Seminar, geometry lecture
hbghlyj
2022-12-16
9
189
hbghlyj
2022-12-17 00:50
[
几何
]
Möbius maps preserve circlines
hbghlyj
2022-8-9
9
260
hbghlyj
2022-8-18 07:26
[
不等式
]
使$k^n/k!$最大的$k$
hbghlyj
2022-3-26
3
304
hbghlyj
2022-3-26 23:23
[
函数
]
Example of a set that is closed and bounded but not compact
hbghlyj
2022-8-2
8
223
hbghlyj
2022-12-23 04:35
[
几何
]
Compass Geometry
hbghlyj
2022-7-17
9
182
hbghlyj
2022-7-18 00:49
350 is solvable
hbghlyj
2023-3-16
7
198
hbghlyj
2023-5-2 17:13
[
数论
]
Proth's Theorem
hbghlyj
2022-6-30
6
261
hbghlyj
2022-8-13 02:49
Thinning of Poisson processes
hbghlyj
2022-12-2
6
180
hbghlyj
2023-6-17 21:04
intersection of two compact subsets in a space may be non-compact and not closed
hbghlyj
2023-1-30
4
149
Czhang271828
2023-2-17 15:19
[
函数
]
integrate around essential singularity
hbghlyj
2023-6-5
6
179
hbghlyj
2023-6-6 04:53
[
函数
]
独立连续函数
hbghlyj
2022-3-26
0
240
hbghlyj
2022-3-26 23:15
2×2 normal matrices are multiples of unitary matrices
hbghlyj
2022-11-29
5
194
Czhang271828
2023-6-9 22:21
[
不等式
]
sorry ,but i don't find homo
tommywong
2023-4-18
6
322
hbghlyj
2025-4-10 04:47
Borel's paradox
hbghlyj
2022-10-29
5
221
hbghlyj
2023-6-17 20:41
Commutative Algebra, Lecture1-3, Cambridge 2010
hbghlyj
2023-5-4
5
142
hbghlyj
2023-6-1 06:35
[
函数
]
$x⁵-6x+3∈ℚ[x]$ is not solvable by radicals.
hbghlyj
2022-7-13
3
213
hbghlyj
2022-8-10 13:39
not equivalent to any matrix in Smith normal form
hbghlyj
2023-3-4
5
126
hbghlyj
2023-3-6 21:06
实对称矩阵的实对称立方根的唯一性
hbghlyj
2022-2-10
1
231
业余的业余
2022-2-10 22:44
Singular perturbation problem
hbghlyj
2023-5-3
2
137
hbghlyj
2023-5-3 10:27
[
组合
]
Inclusion–exclusion principle
hbghlyj
2022-6-27
4
171
Czhang271828
2022-8-6 21:43
Real canonical form
hbghlyj
2022-11-12
4
137
hbghlyj
2023-1-13 05:22
$f$ continuous$⇔f(\overline A)\subseteq\overline{f(A)}\;∀A⊆X$
hbghlyj
2022-10-24
4
134
hbghlyj
2023-5-24 02:53
Liouville’s theorem
hbghlyj
2022-9-11
2
119
hbghlyj
2022-9-11 20:34
Law of the unconscious statistician
hbghlyj
2023-3-10
1
118
hbghlyj
2023-3-10 07:38
what is the answer
tommywong
2022-11-13
2
215
hbghlyj
2025-4-7 20:41
[
几何
]
$\Bbb R^n$中的$n+1$条射线的夹角全都相等
hbghlyj
2022-7-20
3
167
hbghlyj
2022-7-20 20:41
[
函数
]
正交多项式列,满足$f_{n-1}$的根穿插于$f_n$的根
hbghlyj
2022-9-16
4
151
hbghlyj
2023-1-6 06:46
[
几何
]
stereographic projection
hbghlyj
2022-7-18
2
273
hbghlyj
2022-8-8 12:12
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2025-4-20 22:26 GMT+8
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