Helen G. Grundman

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Helen G. Grundman is a professor of mathematics at Bryn Mawr College.

In 1994 Grundman proved that sequences of more than 20 consecutive Harshad numbers in base 10 do not exist. Grundman also found the smallest sequence of 20 such numbers. Each number in this sequence has more than 44 billion digits.

[edit] See also

• Harshad numbers

[edit] References

• Grundman, H. G. (1994). "Sequences of consecutive Niven numbers". Fibonacci Quarterly 32 (2): 174–175. 

[edit] External links

• Faculty profile at Bryn Mawr
• Helen Grundman at the Mathematics Genealogy Project