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+  This file is a part of ZetaGrid, a program and
+  library for seperation of zeros of the Riemann zeta function.
+                                                                                
+  Copyright (c) 2001,2002 Sebastian Wedeniwski.  All rights reserved.
+                                                                                
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions
+  are met:
+                                                                                
+  1. Redistributions of source code must retain the above copyright
+     notice, this list of conditions and the following disclaimer.
+                                                                                
+  2. The origin of this software must not be misrepresented; you must
+     not claim that you wrote the original software.  If you use this
+     software in a product, an acknowledgment in the product
+     documentation would be appreciated but is not required.
+                                                                                
+  3. Altered source versions must be plainly marked as such, and must
+     not be misrepresented as being the original software.
+                                                                                
+  4. The name of the author may not be used to endorse or promote
+     products derived from this software without specific prior written
+     permission.
+                                                                                
+  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
+  OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+  GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+                                                                                
+  Sebastian Wedeniwski, IBM Deutschland Entwicklung GmbH, Germany.
+  wedeniws@de.ibm.com
+                                                                                
+  This program is based on (at least) the work of:
+     R. P. Brent
+     R. S. Lehman
+     J. van de Lune
+     H. J. J. te Riele
+     J. B. Rosser
+     L. Schoenfeld
+     S. Wedeniwski
+     Y. M. Yohe
+     D. T. Winter