首页 参考手册 笔记

HTML 字符集 教程

UTF-8 数学运算符（Mathematical Operators）

范围：十进制 8704-8959，十六进制 2200-22FF。

如果您想要在 HTML 中显示这些字符，您可以使用下表中的 HTML 实体。

如果字符没有 HTML 实体，您可以使用十进制或十六进制引用。

实例

<p>我将显示 &sum;<p>
<p>我将显示 &#8721;<p>
<p>我将显示 &#x2211;<p>

结果如下：
我将显示 ∑
我将显示 ∑
我将显示 ∑
尝试一下 »

并非下表中的所有实体都能在所有的浏览器中正确地显示。

目前，IE 11 是唯一一个能正确显示所有 HTML5 实体的浏览器。

字符 十进制 十六进制 实体 名称
∀ 8704 2200 &forall; FOR ALL
∁ 8705 2201   COMPLEMENT
∂ 8706 2202 &part; PARTIAL DIFFERENTIAL
∃ 8707 2203 &exist; THERE EXISTS
∄ 8708 2204   THERE DOES NOT EXIST
∅ 8709 2205 &empty; EMPTY SET
∆ 8710 2206   INCREMENT
∇ 8711 2207 &nabla; NABLA
∈ 8712 2208 &isin; ELEMENT OF
∉ 8713 2209 &notin; NOT AN ELEMENT OF
∊ 8714 220A   SMALL ELEMENT OF
∋ 8715 220B &ni; CONTAINS AS MEMBER
∌ 8716 220C   DOES NOT CONTAIN AS MEMBER
∍ 8717 220D   SMALL CONTAINS AS MEMBER
∎ 8718 220E   END OF PROOF
∏ 8719 220F &prod; N-ARY PRODUCT
∐ 8720 2210   N-ARY COPRODUCT
∑ 8721 2211 &sum; N-ARY SUMMATION
− 8722 2212 &minus; MINUS SIGN
∓ 8723 2213   MINUS-OR-PLUS SIGN
∔ 8724 2214   DOT PLUS
∕ 8725 2215   DIVISION SLASH
∖ 8726 2216   SET MINUS
∗ 8727 2217 &lowast; ASTERISK OPERATOR
∘ 8728 2218   RING OPERATOR
∙ 8729 2219   BULLET OPERATOR
√ 8730 221A &radic; SQUARE ROOT
∛ 8731 221B   CUBE ROOT
∜ 8732 221C   FOURTH ROOT
∝ 8733 221D &prop; PROPORTIONAL TO
∞ 8734 221E &infin; INFINITY
∟ 8735 221F   RIGHT ANGLE
∠ 8736 2220 &ang; ANGLE
∡ 8737 2221   MEASURED ANGLE
∢ 8738 2222   SPHERICAL ANGLE
∣ 8739 2223   DIVIDES
∤ 8740 2224   DOES NOT DIVIDE
∥ 8741 2225   PARALLEL TO
∦ 8742 2226   NOT PARALLEL TO
∧ 8743 2227 &and; LOGICAL AND
∨ 8744 2228 &or; LOGICAL OR
∩ 8745 2229 &cap; INTERSECTION
∪ 8746 222A &cup; UNION
∫ 8747 222B &int; INTEGRAL
∬ 8748 222C   DOUBLE INTEGRAL
∭ 8749 222D   TRIPLE INTEGRAL
∮ 8750 222E   CONTOUR INTEGRAL
∯ 8751 222F   SURFACE INTEGRAL
∰ 8752 2230   VOLUME INTEGRAL
∱ 8753 2231   CLOCKWISE INTEGRAL
∲ 8754 2232   CLOCKWISE CONTOUR INTEGRAL
∳ 8755 2233   ANTICLOCKWISE CONTOUR INTEGRAL
∴ 8756 2234 &there4; THEREFORE
∵ 8757 2235   BECAUSE
∶ 8758 2236   RATIO
∷ 8759 2237   PROPORTION
∸ 8760 2238   DOT MINUS
∹ 8761 2239   EXCESS
∺ 8762 223A   GEOMETRIC PROPORTION
∻ 8763 223B   HOMOTHETIC
∼ 8764 223C &sim; TILDE OPERATOR
∽ 8765 223D   REVERSED TILDE
∾ 8766 223E   INVERTED LAZY S
∿ 8767 223F   SINE WAVE
≀ 8768 2240   WREATH PRODUCT
≁ 8769 2241   NOT TILDE
≂ 8770 2242   MINUS TILDE
≃ 8771 2243   ASYMPTOTICALLY EQUAL TO
≄ 8772 2244   NOT ASYMPTOTICALLY EQUAL TO
≅ 8773 2245 &cong; APPROXIMATELY EQUAL TO
≆ 8774 2246   APPROXIMATELY BUT NOT ACTUALLY EQUAL TO
≇ 8775 2247   NEITHER APPROXIMATELY NOR ACTUALLY EQUAL TO
≈ 8776 2248 &asymp; ALMOST EQUAL TO
≉ 8777 2249   NOT ALMOST EQUAL TO
≊ 8778 224A   ALMOST EQUAL OR EQUAL TO
≋ 8779 224B   TRIPLE TILDE
≌ 8780 224C   ALL EQUAL TO
≍ 8781 224D   EQUIVALENT TO
≎ 8782 224E   GEOMETRICALLY EQUIVALENT TO
≏ 8783 224F   DIFFERENCE BETWEEN
≐ 8784 2250   APPROACHES THE LIMIT
≑ 8785 2251   GEOMETRICALLY EQUAL TO
≒ 8786 2252   APPROXIMATELY EQUAL TO OR THE IMAGE OF
≓ 8787 2253   IMAGE OF OR APPROXIMATELY EQUAL TO
≔ 8788 2254   COLON EQUALS
≕ 8789 2255   EQUALS COLON
≖ 8790 2256   RING IN EQUAL TO
≗ 8791 2257   RING EQUAL TO
≘ 8792 2258   CORRESPONDS TO
≙ 8793 2259   ESTIMATES
≚ 8794 225A   EQUIANGULAR TO
≛ 8795 225B   STAR EQUALS
≜ 8796 225C   DELTA EQUAL TO
≝ 8797 225D   EQUAL TO BY DEFINITION
≞ 8798 225E   MEASURED BY
≟ 8799 225F   QUESTIONED EQUAL TO
≠ 8800 2260 &ne; NOT EQUAL TO
≡ 8801 2261 &equiv; IDENTICAL TO
≢ 8802 2262   NOT IDENTICAL TO
≣ 8803 2263   STRICTLY EQUIVALENT TO
≤ 8804 2264 &le; LESS-THAN OR EQUAL TO
≥ 8805 2265 &ge; GREATER-THAN OR EQUAL TO
≦ 8806 2266   LESS-THAN OVER EQUAL TO
≧ 8807 2267   GREATER-THAN OVER EQUAL TO
≨ 8808 2268   LESS-THAN BUT NOT EQUAL TO
≩ 8809 2269   GREATER-THAN BUT NOT EQUAL TO
≪ 8810 226A   MUCH LESS-THAN
≫ 8811 226B   MUCH GREATER-THAN
≬ 8812 226C   BETWEEN
≭ 8813 226D   NOT EQUIVALENT TO
≮ 8814 226E   NOT LESS-THAN
≯ 8815 226F   NOT GREATER-THAN
≰ 8816 2270   NEITHER LESS-THAN NOR EQUAL TO
≱ 8817 2271   NEITHER GREATER-THAN NOR EQUAL TO
≲ 8818 2272   LESS-THAN OR EQUIVALENT TO
≳ 8819 2273   GREATER-THAN OR EQUIVALENT TO
≴ 8820 2274   NEITHER LESS-THAN NOR EQUIVALENT TO
≵ 8821 2275   NEITHER GREATER-THAN NOR EQUIVALENT TO
≶ 8822 2276   LESS-THAN OR GREATER-THAN
≷ 8823 2277   GREATER-THAN OR LESS-THAN
≸ 8824 2278   NEITHER LESS-THAN NOR GREATER-THAN
≹ 8825 2279   NEITHER GREATER-THAN NOR LESS-THAN
≺ 8826 227A   PRECEDES
≻ 8827 227B   SUCCEEDS
≼ 8828 227C   PRECEDES OR EQUAL TO
≽ 8829 227D   SUCCEEDS OR EQUAL TO
≾ 8830 227E   PRECEDES OR EQUIVALENT TO
≿ 8831 227F   SUCCEEDS OR EQUIVALENT TO
⊀ 8832 2280   DOES NOT PRECEDE
⊁ 8833 2281   DOES NOT SUCCEED
⊂ 8834 2282 &sub; SUBSET OF
⊃ 8835 2283 &sup; SUPERSET OF
⊄ 8836 2284 &nsub; NOT A SUBSET OF
⊅ 8837 2285   NOT A SUPERSET OF
⊆ 8838 2286 &sube; SUBSET OF OR EQUAL TO
⊇ 8839 2287 &supe; SUPERSET OF OR EQUAL TO
⊈ 8840 2288   NEITHER A SUBSET OF NOR EQUAL TO
⊉ 8841 2289   NEITHER A SUPERSET OF NOR EQUAL TO
⊊ 8842 228A   SUBSET OF WITH NOT EQUAL TO
⊋ 8843 228B   SUPERSET OF WITH NOT EQUAL TO
⊌ 8844 228C   MULTISET
⊍ 8845 228D   MULTISET MULTIPLICATION
⊎ 8846 228E   MULTISET UNION
⊏ 8847 228F   SQUARE IMAGE OF
⊐ 8848 2290   SQUARE ORIGINAL OF
⊑ 8849 2291   SQUARE IMAGE OF OR EQUAL TO
⊒ 8850 2292   SQUARE ORIGINAL OF OR EQUAL TO
⊓ 8851 2293   SQUARE CAP
⊔ 8852 2294   SQUARE CUP
⊕ 8853 2295 &oplus; CIRCLED PLUS
⊖ 8854 2296   CIRCLED MINUS
⊗ 8855 2297 &otimes; CIRCLED TIMES
⊘ 8856 2298   CIRCLED DIVISION SLASH
⊙ 8857 2299   CIRCLED DOT OPERATOR
⊚ 8858 229A   CIRCLED RING OPERATOR
⊛ 8859 229B   CIRCLED ASTERISK OPERATOR
⊜ 8860 229C   CIRCLED EQUALS
⊝ 8861 229D   CIRCLED DASH
⊞ 8862 229E   SQUARED PLUS
⊟ 8863 229F   SQUARED MINUS
⊠ 8864 22A0   SQUARED TIMES
⊡ 8865 22A1   SQUARED DOT OPERATOR
⊢ 8866 22A2   RIGHT TACK
⊣ 8867 22A3   LEFT TACK
⊤ 8868 22A4   DOWN TACK
⊥ 8869 22A5 &perp; UP TACK
⊦ 8870 22A6   ASSERTION
⊧ 8871 22A7   MODELS
⊨ 8872 22A8   TRUE
⊩ 8873 22A9   FORCES
⊪ 8874 22AA   TRIPLE VERTICAL BAR RIGHT TURNSTILE
⊫ 8875 22AB   DOUBLE VERTICAL BAR DOUBLE RIGHT TURNSTILE
⊬ 8876 22AC   DOES NOT PROVE
⊭ 8877 22AD   NOT TRUE
⊮ 8878 22AE   DOES NOT FORCE
⊯ 8879 22AF   NEGATED DOUBLE VERTICAL BAR DOUBLE RIGHT TURNSTILE
⊰ 8880 22B0   PRECEDES UNDER RELATION
⊱ 8881 22B1   SUCCEEDS UNDER RELATION
⊲ 8882 22B2   NORMAL SUBGROUP OF
⊳ 8883 22B3   CONTAINS AS NORMAL SUBGROUP
⊴ 8884 22B4   NORMAL SUBGROUP OF OR EQUAL TO
⊵ 8885 22B5   CONTAINS AS NORMAL SUBGROUP OR EQUAL TO
⊶ 8886 22B6   ORIGINAL OF
⊷ 8887 22B7   IMAGE OF
⊸ 8888 22B8   MULTIMAP
⊹ 8889 22B9   HERMITIAN CONJUGATE MATRIX
⊺ 8890 22BA   INTERCALATE
⊻ 8891 22BB   XOR
⊼ 8892 22BC   NAND
⊽ 8893 22BD   NOR
⊾ 8894 22BE   RIGHT ANGLE WITH ARC
⊿ 8895 22BF   RIGHT TRIANGLE
⋀ 8896 22C0   N-ARY LOGICAL AND
⋁ 8897 22C1   N-ARY LOGICAL OR
⋂ 8898 22C2   N-ARY INTERSECTION
⋃ 8899 22C3   N-ARY UNION
⋄ 8900 22C4   DIAMOND OPERATOR
⋅ 8901 22C5 &sdot; DOT OPERATOR
⋆ 8902 22C6   STAR OPERATOR
⋇ 8903 22C7   DIVISION TIMES
⋈ 8904 22C8   BOWTIE
⋉ 8905 22C9   LEFT NORMAL FACTOR SEMIDIRECT PRODUCT
⋊ 8906 22CA   RIGHT NORMAL FACTOR SEMIDIRECT PRODUCT
⋋ 8907 22CB   LEFT SEMIDIRECT PRODUCT
⋌ 8908 22CC   RIGHT SEMIDIRECT PRODUCT
⋍ 8909 22CD   REVERSED TILDE EQUALS
⋎ 8910 22CE   CURLY LOGICAL OR
⋏ 8911 22CF   CURLY LOGICAL AND
⋐ 8912 22D0   DOUBLE SUBSET
⋑ 8913 22D1   DOUBLE SUPERSET
⋒ 8914 22D2   DOUBLE INTERSECTION
⋓ 8915 22D3   DOUBLE UNION
⋔ 8916 22D4   PITCHFORK
⋕ 8917 22D5   EQUAL AND PARALLEL TO
⋖ 8918 22D6   LESS-THAN WITH DOT
⋗ 8919 22D7   GREATER-THAN WITH DOT
⋘ 8920 22D8   VERY MUCH LESS-THAN
⋙ 8921 22D9   VERY MUCH GREATER-THAN
⋚ 8922 22DA   LESS-THAN EQUAL TO OR GREATER-THAN
⋛ 8923 22DB   GREATER-THAN EQUAL TO OR LESS-THAN
⋜ 8924 22DC   EQUAL TO OR LESS-THAN
⋝ 8925 22DD   EQUAL TO OR GREATER-THAN
⋞ 8926 22DE   EQUAL TO OR PRECEDES
⋟ 8927 22DF   EQUAL TO OR SUCCEEDS
⋠ 8928 22E0   DOES NOT PRECEDE OR EQUAL
⋡ 8929 22E1   DOES NOT SUCCEED OR EQUAL
⋢ 8930 22E2   NOT SQUARE IMAGE OF OR EQUAL TO
⋣ 8931 22E3   NOT SQUARE ORIGINAL OF OR EQUAL TO
⋤ 8932 22E4   SQUARE IMAGE OF OR NOT EQUAL TO
⋥ 8933 22E5   SQUARE ORIGINAL OF OR NOT EQUAL TO
⋦ 8934 22E6   LESS-THAN BUT NOT EQUIVALENT TO
⋧ 8935 22E7   GREATER-THAN BUT NOT EQUIVALENT TO
⋨ 8936 22E8   PRECEDES BUT NOT EQUIVALENT TO
⋩ 8937 22E9   SUCCEEDS BUT NOT EQUIVALENT TO
⋪ 8938 22EA   NOT NORMAL SUBGROUP OF
⋫ 8939 22EB   DOES NOT CONTAIN AS NORMAL SUBGROUP
⋬ 8940 22EC   NOT NORMAL SUBGROUP OF OR EQUAL TO
⋭ 8941 22ED   DOES NOT CONTAIN AS NORMAL SUBGROUP OR EQUAL
⋮ 8942 22EE   VERTICAL ELLIPSIS
⋯ 8943 22EF   MIDLINE HORIZONTAL ELLIPSIS
⋰ 8944 22F0   UP RIGHT DIAGONAL ELLIPSIS
⋱ 8945 22F1   DOWN RIGHT DIAGONAL ELLIPSIS
⋲ 8946 22F2   ELEMENT OF WITH LONG HORIZONTAL STROKE
⋳ 8947 22F3   ELEMENT OF WITH VERTICAL BAR AT END OF HORIZONTAL STROKE
⋴ 8948 22F4   SMALL ELEMENT OF WITH VERTICAL BAR AT END OF HORIZONTAL STROKE
⋵ 8949 22F5   ELEMENT OF WITH DOT ABOVE
⋶ 8950 22F6   ELEMENT OF WITH OVERBAR
⋷ 8951 22F7   SMALL ELEMENT OF WITH OVERBAR
⋸ 8952 22F8   ELEMENT OF WITH UNDERBAR
⋹ 8953 22F9   ELEMENT OF WITH TWO HORIZONTAL STROKES
⋺ 8954 22FA   CONTAINS WITH LONG HORIZONTAL STROKE
⋻ 8955 22FB   CONTAINS WITH VERTICAL BAR AT END OF HORIZONTAL STROKE
⋼ 8956 22FC   SMALL CONTAINS WITH VERTICAL BAR AT END OF HORIZONTAL STROKE
⋽ 8957 22FD   CONTAINS WITH OVERBAR
⋾ 8958 22FE   SMALL CONTAINS WITH OVERBAR
⋿ 8959 22FF   Z NOTATION BAG MEMBERSHIP