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<p>A few of the graduate students have personal home pages where they mention their undergraduate school. But that may not be a very reliable way of counting. A few at Berkeley did come from LACs, although b@r!um or someone else may have said that Berkeley was somewhat more LAC-friendly than other “top” math PhD programs.</p>
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<p>If a math PhD program has strong preferences for undergraduate origins, they are likely based on schools’ math departments and the students coming from them, rather than the general prestige of the schools.</p>