s_curl(3rheolef) [debian man page]

s_curl(3rheolef)						    rheolef-6.1 						  s_curl(3rheolef)

NAME

       s_curl -- curl-like operator for the Stokes stream function computation

SYNOPSIS

	     form(const space M, const space& V, "s_curl");

DESCRIPTION

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

		       /
		       |
	     b(xi,u) = |  u.s_curl(xi) dx
		       |
		       / Omega

       The  M  and  V  space  may be a either P1 or P2 finite element space.  The M space is scalar-valued while the V is vector-valued.  See also
       form(2) and space(2).

       For cartesian coordinate systems, this form coincide with the usual "curl" one (see curl(3)).  In the axisymmetric case:

		       /
		       | (d xi	    d xi   )
	     b(xi,u) = | (---- ur - ---- uz) r dr dz
		       | (d z	    d r    )
		       / Omega

       The b form is denoted as "s_curl", for Stokes stream function computation (see s_grad_grad(3)) as it is closely related to the "curl" oper-
       ator (see curl(3)), but differs by the r and 1/r factors, as:

			  (	  d (r xi)     d xi )
	       curl(xi) = ( (1/r) -------- ; - -----)
			  (	    d r        d z  )

       while

			  ( d xi       d xi )
	     s_curl(xi) = ( ----  ;  - ---- )
			  ( d r        d z  )

       Notice  also that the differentiation is performed on the xi variable here: b(xi,u)=(s_curl(xi),u) while the "curl" form brings the differ-
       entiation on the u vector-valued variable: (curl(u),xi), i.e. a transpose formulation.

ORIENTATION AND SIGN FIX

       The (r,theta,z) coordinate system has positive orientation, thus (z,r,theta) and (z,r) are positive also.  But (r,z,theta)  and	(r,z)  are
       negative : the sign of s_curl is then inverted to obtain the same result as if (z,r) was used.

EXAMPLE

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

	       geo g("square");
	       space M(g, "P1");
	       space V(g, "P1", "vector");
	       form a(M, V, "s_curl");

SEE ALSO

       form(2), space(2), curl(3), s_grad_grad(3), curl(3)

rheolef-6.1							    rheolef-6.1 						  s_curl(3rheolef)

CURLOPT_PROXY_SSL_VERIFYHOST(3) 			     curl_easy_setopt options				   CURLOPT_PROXY_SSL_VERIFYHOST(3)

NAME

       CURLOPT_PROXY_SSL_VERIFYHOST - verify the proxy certificate's name against host

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_SSL_VERIFYHOST, long verify);

DESCRIPTION

       Pass a long set to 2L as asking curl to verify in the HTTPS proxy's certificate name fields against the proxy name.

       This option determines whether libcurl verifies that the proxy cert contains the correct name for the name it is known as.

       When  CURLOPT_PROXY_SSL_VERIFYHOST(3)  is 2, the proxy certificate must indicate that the server is the proxy to which you meant to connect
       to, or the connection fails.

       Curl considers the proxy the intended one when the Common Name field or a Subject Alternate Name field in the certificate matches the  host
       name in the proxy string which you told curl to use.

       When the verify value is 1L, curl_easy_setopt will return an error and the option value will not be changed due to old legacy reasons.

       When the verify value is 0L, the connection succeeds regardless of the names used in the certificate. Use that ability with caution!

       See  also  CURLOPT_PROXY_SSL_VERIFYPEER(3)  to  verify the digital signature of the proxy certificate.  If libcurl is built against NSS and
       CURLOPT_PROXY_SSL_VERIFYPEER(3) is zero, CURLOPT_PROXY_SSL_VERIFYHOST(3) is also set to zero and cannot be overridden.

DEFAULT

       2

PROTOCOLS

       All protocols when used over a HTTPS proxy.

EXAMPLE

       CURL *curl = curl_easy_init();
       if(curl) {
	 curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");

	 /* Set the default value: strict name check please */
	 curl_easy_setopt(curl, CURLOPT_PROXY_SSL_VERIFYHOST, 2L);

	 curl_easy_perform(curl);
       }

AVAILABILITY

       Added in 7.52.0.

       If built TLS enabled.

RETURN VALUE

       Returns CURLE_OK if TLS is supported, and CURLE_UNKNOWN_OPTION if not.

       If 1 is set as argument, CURLE_BAD_FUNCTION_ARGUMENT is returned.

SEE ALSO

       CURLOPT_PROXY_SSL_VERIFYPEER(3), CURLOPT_PROXY_CAINFO(3), , CURLOPT_SSL_VERIFYPEER(3), CURLOPT_CAINFO(3), ,

libcurl 7.54.0							 December 16, 2016				   CURLOPT_PROXY_SSL_VERIFYHOST(3)