## Get illustration

- download Pixel graphics (PNG)
*awesome for presentations* - download Vector graphics (SVG)
*awesome for websites* - download Source file (AI)
*perfect for customizing* - Unlock everything

**Share** — copy and redistribute the material in any medium or format

**Adapt** — remix, transform, and build upon the material for any purpose, even commercially.

**Sharing and adapting of the illustration is allowed with indication of the link to the illustration.**

If the divergence \(\nabla \cdot \boldsymbol{F}\) of a vector field \(\boldsymbol{F}\) at location \((x,y,z)\) is positive:`\[ \nabla \cdot \boldsymbol{F}(x,y,z) ~>~ 0 \]`then there is a *source* of the vector field at the location \((x,y,z)\). If this location is enclosed with an arbitrary surface, then the vector field 'flows' out of the surface.