Changeset 7091:3cb8620c631a

Timestamp:

10/24/07 18:43:37 (6 years ago)

Author:

William Stein <wstein@…>

Branch:

default

Message:

Trac #987 (Moretti and Stein) -- Fix a critical bug found by kricsman involving parsing maxima expressions

File:

• sage/calculus/calculus.py (modified) (2 diffs)

sage/calculus/calculus.py

@@ -121 +121 @@
         sage: float(f(pi))             # random low order bits
         6.1232339957367663e-16
+
+    Another example:
+        sage: f = integrate(1/sqrt(9+x^2), x); f
+        asinh(x/3)
+        sage: f(3)
+        asinh(1)
+        sage: f.diff(x)
+        1/(3*sqrt(x^2/9 + 1))
 
 COERCION EXAMPLES:
@@ -5108 +5116 @@
                 j = msg.rfind("'")
                 nm = msg[i+1:j]
-                syms[nm] = var(nm)
+
+                res = re.match(nm + '\s*\(.*\)', s)
+                if res:
+                    syms[nm] = function(nm)
+                else:
+                    syms[nm] = var(nm)                    
             else:
                 break