| means OR (slower),
\b matches a word "boundary". Accented characters (umlauts, etc.) are not found -- but see
Patterns with Accents below for some tricks.pattern finds ------- ------------------------------------------ ring ring rings bring string scattering Springer etc. \bring ring rings (but not: bring scattering Springer or string) ring\b ring bring string scattering (but not: rings or Springer) \bring\b ring Ring RING (but not: rings bring etc.) algebraic sy algebraic systems algebraic symbols etc. modu|gauss unimodular Gauss gaussian etc. [NO extra spaces around | ]The more complicated pattern:
representation|lie groups|lie algebra|cohomology|deformation
today in the book catalog located all books (about 350) with any of representation, Lie groups, Lie algebra, cohomology, or deformation in their title or as
their subject.
Notes: Some MR class descriptions (and other data) are in the data base but are not printed out. However you can use these in a search
pattern (Example 5 and last Example above). A search may "mysteriously" match because of the data we do not print.
If you also enter a second pattern, the (faster) search will match only if BOTH patterns are found. For instance if the first
pattern is riemann and the second pattern is geometry , then it will only match entries in which both
riemann AND geometry occur somewhere (case insensitive always). This runs faster if the least likely
pattern is placed first. Thus, riemann AND geometry runs faster than geometry AND riemann.
Patterns with Accents
In most cases, to search for a name that has an accented character, such as Poincaré or Kähler, you can substitute an
unaccented character, so Poincare or Kahler should work. Another procedure is to use only a portion of the name that does not contain
any accented character; thus poincar and hler might be used for Poincaré or Kähler.
A better procedure is to substitute a "wild card" for the accented character: replace each accented character by \S*. Thus
search for poincar\S* and k\S*hler This procedure will even catch versions such as Kaehler where an
additional letter has been used.
Patterns with En-dashes
Type two dashes for an en-dash, e.g., Cohen--Macaulay.
EXPERTS: these are perl patterns. You can look in the Unix man page for perl for more hints on patterns (see "Regular Expression" in the perl man page Perl Manual).