i found this in the laplace transforms table, can somebody tell what this means

[tommycashmoney]

i don't understand "erfc" and "erf" what are they?

 

[Dr.Peterson]

i don't understand "erfc" and "erf" what are they?

Did you not try searching for "erfc"?

Erfc -- from Wolfram MathWorld

Erfc is the complementary error function, commonly denoted erfc(z), is an entire function defined by erfc(z) = 1-erf(z) (1) = 2/(sqrt(pi))int_z^inftye^(-t^2)dt. (2) It is implemented in the Wolfram Language as Erfc[z]. Note that some authors (e.g., Whittaker and Watson 1990, p. 341) define...

mathworld.wolfram.com

Error function - Wikipedia

en.wikipedia.org

Wherever the table came from might also have an explanation.