For symbols whose names are marked with an asterisk are, after the lists special rules described.
6 + U+002b plus
- − U+2212 - U+002d minus
' · U+00b7 times (dot)
' ⋅ U+22c5 times (dot)
3 ÷ U+00f7 divided by
7 = U+003d equal
o1 > U+003e greater than
[' < U+003c less than
6 + U+002b plus
- − U+2212 - U+002d minus
6- ± U+00b1 plus minus
-6 ∓ U+2213 minus plus
' · U+00b7 times (dot)
' ⋅ U+22c5 times (dot)
8 × U+00d7 times (cross)
"8 * U+002a times (star)
0 ∘ U+2218 concatenation sign, circle operator
3 ÷ U+00f7 divided by
\ / fraction line (space rules see "9 fractions")
$ ! U+0021 factorial sign
7 = U+003d equal
7 = U+003d equal
97 ≠ U+2260 not equal
77 ≡ U+2261 identically equal, congruent (Number theory)
977 ≢ U+2262 not identical, incongruent (Number theory)
37 ≔ U+2254 equal by definition (Colon equals sign)
73 ≕ U+2255 same by definition (Equal sign colon)
373 XXX interchangeable (colon Equal sign colon)
5 ∼ U+223c similar, equivalent, proportional
95 ≁ U+2241 not similar, not equivalent, not proportional
55 ≈ U+2248 about the same
o1 > U+003e greater than
9o1 ≯ U+226f not bigger than
o7 ≥ U+2265 greater than or equal to
[' < U+003c less than
9[' ≮ U+226e not smaller than
[7 ≤ U+2264 less or equal
oo1 ≫ U+226b big against
[[' ≪ U+226a small against
o1[' ≷ U+2277 bigger or smaller than
['o1 ≶ U+2276 smaller or larger than
o7[' XXX bigger, equal or smaller
[7o1 XXX smaller, equal or greater
+7 ≙ U+2259 corresponds to
+55 XXX Corresponds approximately
@l ∣ U+2223 divides
9@l ∤ U+2224 does not divide
%' ∪ U+222a union of
+' ∩ U+2229 intersection with
*' ∖ U+2216 reduced to, without
/' ∆ U+2206 symmetric difference
%3 ⊔ U+2294 vel (dressing theory)
+3 ⊓ U+2293 (association theory)
&e ∈ U+2208 is element of
9&e ∉ U+2299 is not an element of
&9 ∋ U+220b has to element
<' ⊂ U+2282 is contained in, is subset of
<7 ⊆ U+2286 is contained in or equal to
>1 ⊃ U+2283 contains, is superset of
>7 ⊇ U+2287 contains or is the same
+1 ∧ U+2227 and
%1 ∨ U+2228 or
39 ¬ U+00ac not
57 ≅ U+2245 congruent (geometry)
957 ≇ U+2247 incongruent (geometry)
3+ ⊼ U+22bc projective too
7+ XXX in perspective
#' ⊥ U+22a5 perpendicular to
@= ∥ U+2225 parallel to
@=7 XXX parallel and equal
33o → U+2192 Arrow to the right
31 → U+2192 Arrow to the right
[33 ← U+2190 Arrow to left
"3 ← U+2190 Arrow to left
[33o ↔ U+2194 Double arrow with simple shaft
"31 ↔ U+2194 Double arrow with simple shaft
77o ⇒ U+21D2 Implication (arrow to the right with double shaft)
?71 ⇒ U+21D2 Implikationspfeil (arrow to the right with double shaft)
[77o ⇔ U+21D4 Equivalence arrow (double arrow with double shaft)
?"71 ⇔ U+21D4 Equivalence arrow (double arrow with double shaft)
^31 ↦ U+21a6 assignment arrow
?"2 ↑ U+2191 Arrow up
?2" ↓ U+2193 down arrow
In front of almost all operation and relation signs is a To set spaces, but not after them. As many Operation and relation signs no point of the upper Point series (dots 1 and 4), the easier Following the immediately following character the Recognize the vertical position of the dots with your finger.
The space before an operation or relation character deleted only after signs of Braille, on the anyway no Spaces may follow. These are primarily the surgical and relation signs, opening brackets, exponents and Indices as well as the root sign.
The space before the point is often omitted to the unity of both partial expressions union. So that the point is not read as an outline point a number must be provided with a number become.
For the fraction bar and the faculty sign, the above apply explained general space rules for operation and Relationship not. The playback of fractions is described in the chapter "9 fractions". treated in detail.
Factorial $ immediately follows the term Spaces after the faculty sign exclude a confusion with one of the many symbols that correspond to the key $ start off. If there is no empty space at this point sign must be taken to ensure unambiguousness. To the Example can be a Malpunkt before an opening bracket (if necessary with a braille note) or the accessory to be inserted in order to obtain the unambiguous (see example 5 B10).
The vertical or oblique line through a black-and-white symbol that negates the meaning of the symbol is used in the Braille is represented by a prefix 9.
Individual relation symbols can be found in the inkprint. have different shapes. The bottom line at the symbol for For example, "greater than or equal to" may be horizontal or oblique be shown. The Braille lettering symbol stands for everyone common variants of the Schwarzschriftsymbols.
Hints: For markings on symbols that are like surgical or Look like a relationship symbol, see "8 Simple and Comprehensive capturing markings". The formerly common division mark 4 is no longer used in the braille code.