X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=ginac%2Fflags.h;h=d81a00e4d88163b30efd3e27ed2556efe37f2a43;hp=a416958d1511a7133b09ece92a8adeebfd2b1ba7;hb=dcb735feae4c3a6962a7824e03b0ce4496e3ffe7;hpb=619d77d2676f7f1a562fb9fefc0ba6754fe2d750

diff --git a/ginac/flags.h b/ginac/flags.h
index a416958d..d81a00e4 100644
--- a/ginac/flags.h
+++ b/ginac/flags.h
@@ -3,7 +3,7 @@
  *  Collection of all flags used through the GiNaC framework. */
 
 /*
- *  GiNaC Copyright (C) 1999-2007 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2021 Johannes Gutenberg University Mainz, Germany
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -20,8 +20,8 @@
  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
-#ifndef __GINAC_FLAGS_H__
-#define __GINAC_FLAGS_H__
+#ifndef GINAC_FLAGS_H
+#define GINAC_FLAGS_H
 
 namespace GiNaC {
 
@@ -30,7 +30,9 @@ class expand_options {
 public:
 	enum {
 		expand_indexed = 0x0001,      ///< expands (a+b).i to a.i+b.i
-		expand_function_args = 0x0002 ///< expands the arguments of functions
+		expand_function_args = 0x0002, ///< expands the arguments of functions
+		expand_rename_idx = 0x0004, ///< used internally by mul::expand()
+		expand_transcendental = 0x0008 ///< expands transcendental functions like log and exp
 	};
 };
 
@@ -38,7 +40,7 @@ public:
 class has_options {
 public:
 	enum {
-		algebraic = 0x0001,              ///< enable algebraic matching
+		algebraic = 0x0001              ///< enable algebraic matching
 	};
 };
 
@@ -53,7 +55,7 @@ public:
 		pattern_is_product = 0x0004,     ///< used internally by expairseq::subschildren()
 		pattern_is_not_product = 0x0008, ///< used internally by expairseq::subschildren()
 		no_index_renaming = 0x0010,
-		// To indicate that we want to substitue an index by something that is
+		// To indicate that we want to substitute an index by something that
 		// is not an index. Without this flag the index value would be
 		// substituted in that case.
 		really_subs_idx = 0x0020
@@ -180,7 +182,15 @@ public:
 		 *  linear systems.  In contrast to division-free elimination it only
 		 *  has a linear expression swell.  For two-dimensional systems, the
 		 *  two algorithms are equivalent, however. */
-		bareiss
+		bareiss,
+		/** Markowitz-ordered Gaussian elimination. Same as the usual
+		 *  Gaussian elimination, but with additional effort spent on
+		 *  selecting pivots that minimize fill-in. Faster than the
+		 *  methods above for large sparse matrices (particularly with
+		 *  symbolic coefficients), otherwise slightly slower than
+		 *  Gaussian elimination.
+		 */
+		markowitz
 	};
 };
 
@@ -193,7 +203,12 @@ public:
 		evaluated       = 0x0002, ///< .eval() has already done its job
 		expanded        = 0x0004, ///< .expand(0) has already done its job (other expand() options ignore this flag)
 		hash_calculated = 0x0008, ///< .calchash() has already done its job
-		not_shareable   = 0x0010  ///< don't share instances of this object between different expressions unless explicitly asked to (used by ex::compare())
+		not_shareable   = 0x0010, ///< don't share instances of this object between different expressions unless explicitly asked to (used by ex::compare())
+		has_indices	= 0x0020,
+		has_no_indices	= 0x0040, // ! (has_indices || has_no_indices) means "don't know"
+		is_positive	= 0x0080,
+		is_negative	= 0x0100,
+		purely_indefinite = 0x0200  // If set in a mul, then it does not contains any terms with determined signs, used in power::expand()
 	};
 };
 
@@ -201,7 +216,7 @@ public:
 class info_flags {
 public:
 	enum {
-		// answered by class numeric and symbols/constants in particular domains
+		// answered by class numeric, add, mul, function and symbols/constants in particular domains
 		numeric,
 		real,
 		rational,
@@ -243,14 +258,19 @@ public:
 		rational_polynomial,
 		crational_polynomial,
 		rational_function,
-		algebraic,
 
 		// answered by class indexed
 		indexed,      // class can carry indices
 		has_indices,  // object has at least one index
 
 		// answered by class idx
-		idx
+		idx,
+
+		// answered by classes numeric, symbol, add, mul, power
+		expanded,
+
+		// is meaningful for mul only
+		indefinite
 	};
 };
 
@@ -275,6 +295,15 @@ public:
 	};
 };
 
+/** Flags to control the polynomial factorization. */
+class factor_options {
+public:
+	enum {
+		polynomial = 0x0000, ///< factor only expressions that are polynomials
+		all        = 0x0001  ///< factor all polynomial subexpressions
+	};
+};
+
 } // namespace GiNaC
 
-#endif // ndef __GINAC_FLAGS_H__
+#endif // ndef GINAC_FLAGS_H