Tetradics transform dyadics in much the same way that dyadics transform vectors. They are represented using Hebrew characters and have 81 components (Morse and Feshbach 1953, pp. 72-73). The use of tetradics is archaic, since tensors perform the same function but are notationally simpler.

# Tetradic

## See also

Dyadic, Tetradic Number## Explore with Wolfram|Alpha

## References

Morse, P. M. and Feshbach, H.*Methods of Theoretical Physics, Part 1.*New York: McGraw-Hill, 1953.

## Referenced on Wolfram|Alpha

Tetradic## Cite this as:

Weisstein, Eric W. "Tetradic." From *MathWorld*--A Wolfram Web Resource. https://mathworld.wolfram.com/Tetradic.html