Consider the Laplace transform $\tilde{f}(s)$ of a function $f(t)$ defined as $$\tilde{f}(s)=\int_0^\infty f(t)e^{-st} \, dt.$$ Can this relation be inverted to obtain $f(t)$ in terms of $\tilde{f}(s)$?
The reason I ask this is as follows. The Fourier transform $$\tilde{f}(k) = \int_{-\infty}^\infty f(x)e^{-ikx} \, dx$$ is defined simulataneously with the inversion formula $$f(x)=\int_{-\infty}^\infty\tilde{f}(k)e^{ikx} \, dk.$$ But I haven't seen the same for the Laplace's transform.
Yes, the Laplace transform can be inverted. Based on your earlier question I suspect you're actually curious whether the inverse is given by $$f(t)=\int_0^\infty\tilde f(s)e^{-st}\,ds.$$No, that is absolutely not how you invert the Laplace transform.