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数学期刊 今日: 2 |主题: 2145|排名: 7 

版主: 周华
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预览 英国的海岸线有多长?有人说是无穷长 attach_img luyuanhong 2023-8-3 18:12 03013 luyuanhong 2023-8-3 18:12
预览 业余爱好者的两番重要发现,帮组合数学迎来关键突破 attach_img luyuanhong 2023-7-31 23:51 02907 luyuanhong 2023-7-31 23:51
预览 折纸一时爽,一直折一直爽 attach_img luyuanhong 2023-7-30 00:42 02767 luyuanhong 2023-7-30 00:42
预览 Peter Sarnak 给数学新手的忠告:要敢于让自己去解决困难问题 attach_img luyuanhong 2023-7-30 00:30 02728 luyuanhong 2023-7-30 00:30
预览 高温超导研究面临的挑战 attach_img luyuanhong 2023-7-28 20:10 02825 luyuanhong 2023-7-28 20:10
预览 最小作用量原理及其量子实验 attach_img luyuanhong 2023-7-27 13:13 02707 luyuanhong 2023-7-27 13:13
预览 让几何学精神在中国大地生根 attach_img luyuanhong 2023-7-27 09:48 02597 luyuanhong 2023-7-27 09:48
预览 巧作三角形 证明不等式 attach_img luyuanhong 2023-7-26 17:32 02884 luyuanhong 2023-7-26 17:32
预览 微积分在西元前——古典微积分思想分析与探讨 attach_img luyuanhong 2023-7-25 20:28 03110 luyuanhong 2023-7-25 20:28
预览 古典着色问题的新时代算法 attach_img luyuanhong 2023-7-25 09:56 02821 luyuanhong 2023-7-25 09:56
预览 Abel 的生平与工作概览:从一道高考题谈起 attach_img luyuanhong 2023-7-21 19:58 02923 luyuanhong 2023-7-21 19:58
预览 原子核内的千奇百态:神秘又迷人的核异构体 attach_img luyuanhong 2023-7-20 19:39 02784 luyuanhong 2023-7-20 19:39
预览 罗杰·彭罗斯:量子力学之谜丨展卷 attach_img luyuanhong 2023-7-17 11:52 12575 luyuanhong 2023-7-17 11:55
预览 争议 60 年,热水比冷水结冰更快吗? attach_img luyuanhong 2023-7-17 10:54 02936 luyuanhong 2023-7-17 10:54
预览 折纸与古希腊三大作图问题 attach_img luyuanhong 2023-7-15 12:53 03127 luyuanhong 2023-7-15 12:53
预览 汪卫华:我为什么写《非晶物质》?|曹则贤品读 attach_img luyuanhong 2023-7-15 11:17 02911 luyuanhong 2023-7-15 11:17
预览 Weil :数论今昔两讲(上) attach_img luyuanhong 2023-7-13 13:57 02937 luyuanhong 2023-7-13 13:57
预览 Weil :数论今昔两讲(下) attach_img luyuanhong 2023-7-12 19:53 13123 luyuanhong 2023-7-12 20:15
预览 诺奖得主 Wilczek :“眼前”的量子力学 attach_img luyuanhong 2023-7-12 10:56 02853 luyuanhong 2023-7-12 10:56
预览 说到数学的实用性,再没有比这段描述更简洁的了 attach_img luyuanhong 2023-7-12 00:07 02656 luyuanhong 2023-7-12 00:07
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\frac{\square}{\square}\sqrt{\square}\square_{\baguet}^{\baguet}\overarc{\square}\ \dot{\baguet}\left(\square\right)\binom{\square}{\square}\begin{cases}\square\\\square\end{cases}\ \begin{bmatrix}\square&\square\\\square&\square\end{bmatrix}\to\Rightarrow\mapsto\alpha\ \theta\ \pi\times\div\pm\because\angle\ \infty
\frac{\square}{\square}\sqrt{\square}\sqrt[\baguet]{\square}\square_{\baguet}\square^{\baguet}\square_{\baguet}^{\baguet}\sum_{\baguet}^{\baguet}\prod_{\baguet}^{\baguet}\coprod_{\baguet}^{\baguet}\int_{\baguet}^{\baguet}\lim_{\baguet}\lim_{\baguet}^{\baguet}\bigcup_{\baguet}^{\baguet}\bigcap_{\baguet}^{\baguet}\bigwedge_{\baguet}^{\baguet}\bigvee_{\baguet}^{\baguet}
\underline{\square}\overline{\square}\overrightarrow{\square}\overleftarrow{\square}\overleftrightarrow{\square}\underrightarrow{\square}\underleftarrow{\square}\underleftrightarrow{\square}\dot{\baguet}\hat{\baguet}\vec{\baguet}\tilde{\baguet}
\left(\square\right)\left[\square\right]\left\{\square\right\}\left|\square\right|\left\langle\square\right\rangle\left\lVert\square\right\rVert\left\lfloor\square\right\rfloor\left\lceil\square\right\rceil\binom{\square}{\square}\boxed{\square}
\begin{cases}\square\\\square\end{cases}\begin{matrix}\square&\square\\\square&\square\end{matrix}\begin{pmatrix}\square&\square\\\square&\square\end{pmatrix}\begin{bmatrix}\square&\square\\\square&\square\end{bmatrix}\begin{Bmatrix}\square&\square\\\square&\square\end{Bmatrix}\begin{vmatrix}\square&\square\\\square&\square\end{vmatrix}\begin{Vmatrix}\square&\square\\\square&\square\end{Vmatrix}\begin{array}{l|l}\square&\square\\\hline\square&\square\end{array}
\to\gets\leftrightarrow\nearrow\searrow\downarrow\uparrow\updownarrow\swarrow\nwarrow\Leftarrow\Rightarrow\Leftrightarrow\rightharpoonup\rightharpoondown\impliedby\implies\Longleftrightarrow\leftharpoonup\leftharpoondown\longleftarrow\longrightarrow\longleftrightarrow\Uparrow\Downarrow\Updownarrow\hookleftarrow\hookrightarrow\mapsto
\alpha\beta\gamma\Gamma\delta\Delta\epsilon\varepsilon\zeta\eta\theta\Theta\iota\kappa\varkappa\lambda\Lambda\mu\nu\xi\Xi\pi\Pi\varpi\rho\varrho\sigma\Sigma\tau\upsilon\Upsilon\phi\Phi\varphi\chi\psi\Psi\omega\Omega\digamma\vartheta\varsigma\mathbb{C}\mathbb{H}\mathbb{N}\mathbb{P}\mathbb{Q}\mathbb{R}\mathbb{Z}\Re\Im\aleph\partial\nabla
\times\cdot\ast\div\pm\mp\circ\backslash\oplus\ominus\otimes\odot\bullet\varnothing\neq\equiv\not\equiv\sim\approx\simeq\cong\geq\leq\ll\gg\succ\prec\in\ni\cup\cap\subset\supset\not\subset\not\supset\notin\not\ni\subseteq\supseteq\nsubseteq\nsupseteq\sqsubset\sqsupset\sqsubseteq\sqsupseteq\sqcap\sqcup\wedge\vee\neg\forall\exists\nexists\uplus\bigsqcup\bigodot\bigotimes\bigoplus\biguplus\bigcap\bigcup\bigvee\bigwedge
\because\therefore\angle\parallel\perp\top\nparallel\measuredangle\sphericalangle\diamond\diamondsuit\doteq\propto\infty\bowtie\square\smile\frown\bigtriangledown\triangle\triangleleft\triangleright\bigcirc \wr\amalg\models\preceq\mid\nmid\vdash\dashv\nless\ngtr\ldots\cdots\vdots\ddots\surd\ell\flat\sharp\natural\wp\clubsuit\heartsuit\spadesuit\oint\lfloor\rfloor\lceil\rceil\lbrace\rbrace\lbrack\rbrack\vert\hbar\aleph\dagger\ddagger

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