# Sandbox

### From Mwiki

## Contents |

# Sample 1

This is fancy.

Hello world! |
Something else. |

\(\int_0^\infty e^{-x} dx\) This works fine

Note. $1+1=2$ If I give a name or number to the parameter, math comes out just fine. However, it bothers me that I cannot put two separate paragraphs inside a note.I'm not sure why, but putting a line with a colon in between seems to separate paragraphs for templates.

Note. You meanlike

this? (Note two consecutive colons don't create more space)

**Sketch of the proof.**

This article is a **stub**. You can help this nonlocal wiki by expanding it.

## References

- Gilbarg, David; Trudinger, Neil S. (2001),
*Elliptic partial differential equations of second order*(2nd ed.), Berlin, New York: Springer-Verlag, ISBN 978-3-540-41160-4

# Sample 2: Inline references

This is a citation.^{[1]} And also this ones. ^{[2]} ^{[3]}

# Sample Picture

This is an image of the file File:Matias.jpg

## References

- ↑ Gilbarg, David; Trudinger, Neil S. (2001),
*Elliptic partial differential equations of second order*(2nd ed.), Berlin, New York: Springer-Verlag, ISBN 978-3-540-41160-4 - ↑ Yang, Ray (2013), "Optimal Regularity and Nondegeneracy of a Free Boundary Problem Related to the Fractional Laplacian",
*Arch. Ration. Mech. Anal.***208**: 693--723, doi:10.1007/s00205-013-0619-7, ISSN 0003-9527, http://dx.doi.org/10.1007/s00205-013-0619-7 - ↑ Evans, Lawrence C. (1998),
*Partial differential equations*, Graduate Studies in Mathematics,**19**, American Mathematical Society, pp. xviii+662