Question Number 27392 by A1B1C1D1 last updated on 06/Jan/18
$$\mathrm{Show}\:\mathrm{that}\:\mathrm{the}\:\mathrm{integral}: \\ $$$$ \\ $$$$\int\:\mathrm{e}^{−\mathrm{x}^{\mathrm{2}} } \:\mathrm{dx} \\ $$$$ \\ $$$$\mathrm{Can}'\mathrm{t}\:\mathrm{be}\:\mathrm{calculated}\:\mathrm{trivially}. \\ $$