Title
The Fifteen Schoolgirls
Sold by Ergodebooks, an authorized reseller.
Returns accepted within 30 days | support@ergodebooks.com
Shipping Information
- Free Standard Shipping — United States only
- Processing Time: 1–3 business days
- Estimated Delivery: 3–5 business days after dispatch
- Double-boxed, fully insured & discreetly packaged
- Tracking number sent via email once dispatched
- Orders over $250 require signature upon delivery. Taxes calculated at checkout.
Returns & Refund
Returns accepted within 30 days of delivery.
Damaged or Defective Item
Free return shipping + replacement or full refund
Wrong Item Received
Free return shipping + replacement or full refund
Change of Mind
Return shipping at customer's expense · 25% restocking fee applies
A Famous Problem Found In Books On Mathematical Recreations Was First Proposed In An Annual In 1850 By A Vicar And Amateur Mathematician, Thomas Kirkman. Fifteen Schoolgirls Walk Out Three Abreast For Seven Days And It Was Required To Arrange Each Day'S Walk So That Any Pair Of Girls Were Only Once In The Same Row During The Week. The Puzzle Arose From Kirkman'S Work On A More General Mathematical Problem Which He Was To Explore In A Number Of Published Articles Over The Next Few Years. Much Of His Work Was Ignored At The Time, But It Involved Various Combinatorial Ideas That Have Now Become Of Some Interest And Importance. He Was Also Interested In A Range Of Other Mathematics, Such As The Theory Of Polyhedra, The Newly Developing Theory Of Groups, And The Classification Of Knots. He Was Respected By Many Of His Professionals And Was Elected A Fellow Of The Royal Society. This Book Presents A Brief Account Of The Original Problem And Some Of The Ways It Has Been Generalised And Eventually Solved. It Also Surveys In A Not Too Technical Way, Some Of The Other Work Of A Remarkable Nineteenthcentury Polymath.
⚠️ WARNING (California Proposition 65):
This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
For more information, please visit www.P65Warnings.ca.gov.