Tav (letter)
Tav ( ת , marked // or //) is the twenty-second letter of the Hebrew alphabet.
The Tau ( Τ, τ ) of the Greek alphabet, the T ( T, T ) of the Latin alphabet and its equivalent in the Cyrillic alphabet derive from Tav phenician.
Its numerical value is 400.
In Hebrew
With the daguesh
The תּ decides/T/(like the T French ).
Without the daguesh
The ת decides/θ/(like English HT), and sometimes/S/(like the S French ).
Other uses
When Cantor discovered the transfinite cardinals, it named a ת . Its significance is not clear. If it is the cardinal of all the cardinals, one arrives at a paradox, similar to that of Burali-Forti in connection with the greatest number which one can conceive. Its notes do not make it possible to know if it is about an indescribable or inaccessible cardinal.
See too
Note
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