HL7 v3, a health care application layer specification, uses the term with time intervals as
an operation on a totally ordered set that produces the smallest interval that is a superset.
For example, hull({[1,5], [7,10]}) == [1,10]
The unabridged specification part II available on Dr. Schadow's page http://aurora.regenstrief.org/v3dt/
gives nice examples.





On Sunday, August 17, 2003, at 05:13 PM, Paul A. Bristow wrote:

But as Michael Caine said "Not a lot of people know that" - so I trust you will
explain what it does too for the benefit of us mere non-mathematical mortals!

Paul



| -----Original Message-----
| From: [EMAIL PROTECTED]
| [mailto:[EMAIL PROTECTED] Behalf Of [EMAIL PROTECTED]
| Sent: Sunday, August 17, 2003 7:11 AM
| To: Boost mailing list
| Subject: Re: [boost] Re: Date iterators in Boost Date-Time
|
|
| En réponse à Jeff Garland <[EMAIL PROTECTED]>:
|

| I just wanted to mention that the interval library names this
| operation "hull".
| It is a mathematically defined term since the operation is indeed a
| convex hull.
|
| Just my two eurocents,
|
| Guillaume
|

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