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• Show that if D is a set and E is a closed set containing D, then E must contain ƏD, i.e., the boundary of D. • Let us define C = {S c C | D C S, S is closed.} D = ƏD U D. Show that D = Ns SEC

• Show that if D is a set and E is a closed set containing D, then E must contain ƏD, i.e., the boundary of D. • Let us define C = {S c C | D C S, S is closed.} D = ƏD U D. Show that D = Ns SEC

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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• Show that if D is a set and E is a closed set containing D, then E must contain ðD, i.e., the boundary of D. • Let us define C = {S c C | D C S, S is closed.} D = ƏDU D. Show that D = N s SEC
Transcribed Image Text:• Show that if D is a set and E is a closed set containing D, then E must contain ðD, i.e., the boundary of D. • Let us define C = {S c C | D C S, S is closed.} D = ƏDU D. Show that D = N s SEC
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