---
name: "grad"
section: "3rheolef"
platform: "linux"
package: "librheolef-dev"
version: "6.1-2.1"
release: "Debian 7 (Wheezy)"
platforms: ["linux"]
url: "https://new.carta.tech/grad"
---

# grad(3rheolef)

## NAME

**grad** -- gradient operator

## SYNOPSIS

```
      form(const space V, const space& M, "grad");

```

## DESCRIPTION

Assembly the form associated to the gradient operator on a finite element space **V**:

```
                /
                |
      b(u, q) = | grad(u).q dx
                |
                / Omega

```

The V space may be a either **P1**  or **P2**  finite element space, while the M space may be **P0**  or **P1d**  respectively. See also form(2) and space(2).

## EXAMPLE

The following piece of code build the divergence form associated to the **P1** approximation:

```
        geo omega("square");
        space V(omega, "P1");
        space M(omega, "P0", "vector");
        form b(V, M, "grad");

```

## SEE ALSO

form(2), space(2)