Integral of gaussian distribution. $$ I^2 = \int \int e^ {-x^2-y^2} dA $$ In context, the integrand a function that returns Nov 4, 2023 · Separating an integral Ask Question Asked 2 years, 4 months ago Modified 2 years, 4 months ago Dec 15, 2017 · A different type of integral, if you want to call it an integral, is a "path integral". Oct 11, 2025 · However, one "intrinsic integral closure" that is often used is the normalization, which in the case on an integral domain is the integral closure in its field of fractions. Nov 4, 2023 · Separating an integral Ask Question Asked 2 years, 4 months ago Modified 2 years, 4 months ago Oct 11, 2025 · However, one "intrinsic integral closure" that is often used is the normalization, which in the case on an integral domain is the integral closure in its field of fractions. Can someone help me?. $$ I tried to use complex integration and Cauchy's theorem but it didn't work. Feb 4, 2018 · The integral of 0 is C, because the derivative of C is zero. If by integral you mean the cumulative distribution function $\Phi (x)$ mentioned in the comments by the OP, then your assertion is incorrect. @user599310, I am going to attempt some pseudo math to show it: $$ I^2 = \int e^-x^2 dx \times \int e^-x^2 dx = Area \times Area = Area^2$$ We can replace one x, with a dummy variable, move the dummy copy into the first integral to get a double integral. These are actually defined by a "normal" integral (such as a Riemann integral), but path integrals do not seek to find the area under a curve. The integral which you describe has no closed form which is to say that it cannot be expressed in elementary functions. I think of them as finding a weighted, total displacement along a curve. It's the maximal integral extension with the same fraction field as the original domain. Dec 15, 2017 · A different type of integral, if you want to call it an integral, is a "path integral". Feb 17, 2025 · The noun phrase "improper integral" written as $$ \int_a^\infty f (x) \, dx $$ is well defined. If the appropriate limit exists, we attach the property "convergent" to that expression and use the same expression for the limit. Feb 28, 2026 · I have an integral, $$ I = \int_a^b x f (x) dx $$ and I would like to express this in terms of $\int_a^b f (x) dx$ if possible, but I don't see how integration by parts will help here. Feb 6, 2026 · Evaluate an integral involving a series and product in the denominator Ask Question Asked 1 month ago Modified 1 month ago Feb 28, 2026 · I have an integral, $$ I = \int_a^b x f (x) dx $$ and I would like to express this in terms of $\int_a^b f (x) dx$ if possible, but I don't see how integration by parts will help here. May 28, 2021 · I am having difficulties to compute this integral $$ \int_ {-\infty}^\infty e^ {\pm ix^2} \, dx. $$ I^2 = \int \int e^ {-x^2-y^2} dA $$ In context, the integrand a function that returns If by integral you mean the cumulative distribution function $\Phi (x)$ mentioned in the comments by the OP, then your assertion is incorrect. For example, you can express $\int x^2 \mathrm {d}x$ in elementary functions such as $\frac {x^3} {3} +C$. Also, it makes sense logically if you recall the fact that the derivative of the function is the function's slope, because any function f (x)=C will have a slope of zero at point on the function. Can someone help me? Feb 28, 2026 · I have an integral, $$ I = \int_a^b x f (x) dx $$ and I would like to express this in terms of $\int_a^b f (x) dx$ if possible, but I don't see how integration by parts will help here.
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