Double bubbles outside a disc

Banyat Sroysang^a, Wacharin Wichiramala^b,c,*

ABSTRACT: We show that the least-perimeter way to enclose and separate two regions of prescribed area outside a disc is a truncated standard double bubble.

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^a	Department of Mathematics and Statistics, Faculty of Science and Technology, Thammasat University, Rangsit Centre, Pathumthani 12121, Thailand
^b	Department of Mathematics, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
^c	Centre of Excellence in Mathematics, CHE, Si Ayutthaya Rd., Bangkok 10400, Thailand

* Corresponding author, E-mail: wacharin.w@chula.ac.th

Received 30 Apr 2010, Accepted 14 Aug 2010

Double bubbles outside a disc

Banyat Sroysanga, Wacharin Wichiramalab,c,*

Banyat Sroysang^a, Wacharin Wichiramala^b,c,*