Fig. 9.
The first BCPWs in a 2D domain 
color-coded with its height functions, where we only show its nonzero part in domain 
.
Official websites use .gov
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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.