Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Visualization for quasi-conformality: circle fields on the source (supine) are mapped to ellipse field on the target (prone) by the registration map (see the zoomed-in views). The narrower ellipses correspond to the large stretching part (in red).
