UTF-8 数学运算符

  • 定义和使用

    如果字符没有 HTML 实体,则可以使用十进制(dec)或十六进制(hex)引用。
    如果要在 HTML 中显示特殊字符,可以使用下表中的 HTML 实体。
    字符 十进制 十六进制 实体 名称
    8704 2200 ∀ FOR ALL
    8705 2201   COMPLEMENT
    8706 2202 ∂ PARTIAL DIFFERENTIAL
    8707 2203 ∃ THERE EXISTS
    8708 2204   THERE DOES NOT EXIST
    8709 2205 ∅ EMPTY SET
    8710 2206   INCREMENT
    8711 2207 ∇ NABLA
    8712 2208 ∈ ELEMENT OF
    8713 2209 ∉ NOT AN ELEMENT OF
    8714 220A   SMALL ELEMENT OF
    8715 220B ∋ CONTAINS AS MEMBER
    8716 220C   DOES NOT CONTAIN AS MEMBER
    8717 220D   SMALL CONTAINS AS MEMBER
    8718 220E   END OF PROOF
    8719 220F ∏ N-ARY PRODUCT
    8720 2210   N-ARY COPRODUCT
    8721 2211 ∑ N-ARY SUMMATION
    8722 2212 − MINUS SIGN
    8723 2213   MINUS-OR-PLUS SIGN
    8724 2214   DOT PLUS
    8725 2215   DIVISION SLASH
    8726 2216   SET MINUS
    8727 2217 ∗ ASTERISK OPERATOR
    8728 2218   RING OPERATOR
    8729 2219   BULLET OPERATOR
    8730 221A √ SQUARE ROOT
    8731 221B   CUBE ROOT
    8732 221C   FOURTH ROOT
    8733 221D ∝ PROPORTIONAL TO
    8734 221E ∞ INFINITY
    8735 221F   RIGHT ANGLE
    8736 2220 ∠ 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 ∧ LOGICAL AND
    8744 2228 ∨ LOGICAL OR
    8745 2229 ∩ INTERSECTION
    8746 222A ∪ UNION
    8747 222B ∫ 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 ∴ 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 ∼ 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 ≅ APPROXIMATELY EQUAL TO
    8774 2246   APPROXIMATELY BUT NOT ACTUALLY EQUAL TO
    8775 2247   NEITHER APPROXIMATELY NOR ACTUALLY EQUAL TO
    8776 2248 ≈ 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 ≠ NOT EQUAL TO
    8801 2261 ≡ IDENTICAL TO
    8802 2262   NOT IDENTICAL TO
    8803 2263   STRICTLY EQUIVALENT TO
    8804 2264 ≤ LESS-THAN OR EQUAL TO
    8805 2265 ≥ 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 ⊂ SUBSET OF
    8835 2283 ⊃ SUPERSET OF
    8836 2284 ⊄ NOT A SUBSET OF
    8837 2285   NOT A SUPERSET OF
    8838 2286 ⊆ SUBSET OF OR EQUAL TO
    8839 2287 ⊇ 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 ⊕ CIRCLED PLUS
    8854 2296   CIRCLED MINUS
    8855 2297 ⊗ 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 ⊥ 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 ⋅ 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
    注意:较旧的浏览器可能不支持上表中的所有HTML5实体。 Chrome具有良好的支持。 但是(当前)只有IE 11+和Firefox 35+支持所有实体。
  • 示例

    <p>I will display &sum;</p>
    <p>I will display &#8721;</p>
    <p>I will display &#x2211;</p>
    
    
    显示结果为:
    I will display ∑
    
    I will display ∑
    
    I will display ∑
    
    
    尝试一下