An operator (not to be confused with operation) is a mapping from one vector space or module to another. Operators are of critical importance to both linear algebra and functional analysis. Important properties that various operators may exhibit include linearity, continuity, and boundedness.

Important special cases of an operator include:

  • Functional, which maps a vector space to its underlying field. The space of functionals over a vector space exhibits duality to it, which has numerous applications. Important applications of functionals are the theories of generalized functions, which extends the classical notion of a function and derivative, and calculus of variations, which generalizes the notion of differential to functionals as they are. Both are of great importance to theoretical physics.
  • Linear operator, which has a number of characteristics that ease its study. Important examples of linear operators are integral and derivative. In finite-dimensional spaces linear operators are often represented by matrices.

From Wikipedia under the GNU Free Documentation License
Wed Jul 28 06:28:47 2010

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Telecom Handset Infrastructure Vendors

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the present environment so much that he elected to stay longer That s true job satisfaction Walt actually knew Steve when as a young kid when he was first attracted to the MUNI system Steve Clark in the center of the photo was the Supervisor on the trip and consistently demonstrated his ability to get things done He made maximum use of technology to ensure that he

From Yahoo Image Search: "Operators"
Mon Jul 26 14:56:02 2010

What do MRI scan operators do in their lunchbreak?
edugeek.net
What do MRI scan operators do in their lunchbreak?

tech_guy

Fri, 16 Jul 2010 19:34:51 GM

Reputation tech_guy's Avatar. Join Date: May 2007; Location: That little bit in the middle of England; Posts: 5061; Blog Entries: 3; Thank Post: 865: Thanked 571 Times in 305 Posts. Rep Power: 131. Default What do MRI scan . operators. do ...

Defense Systems Info Homeland Security Needs UAV Operators NOW!
defensesystems.info
Defense Systems Info Homeland Security Needs UAV Operators NOW!

Peter Westwood

Sun, 18 Jul 2010 04:08:04 GM

A British Reaper sensor . operator. from the 62nd Expeditionary Reconnaissance Squadron at Kandahar on November 5. Photo from Wired. More here: Homeland Security Needs UAV . Operators. NOW! This entry was posted on Saturday, July 17th, ...

education, jobs@India: SSC July 2010 Data Entry Operators , LDC ...
edutalkindia.blogspot.com
education, jobs@India: SSC July 2010 Data Entry Operators , LDC ...

Edutalk India

Sat, 17 Jul 2010 08:22:00 GM

SSC July 2010 Data Entry . Operators. , LDC Combined Higher Secondary Level (10+2) Examination. SSC Combined Higher Secondary Level Examination 2010 notification for data entry . operators. , LDC and more. Data Entry . Operators. : multiple ...

From Google Blog Search: "Operators"
Mon Jul 19 19:09:13 2010

JIL's slow progress doesn't bode well for WAC - Telecoms.com (blog)
telecoms.com
JIL's slow progress doesn't bode well for WAC - Telecoms.com (blog)
Thu, 29 Jul 2010 09:48:58 GMT+00:00
Telecoms.com (blog) It has also fleshed out plans for its merger with JIL a similar initiative launched in April 2008 by a select clique of operators ; namely China Mobile, ... Mobile operators pursue app store plans Screen Digest (press release) (subscription) 'Telekom Austria joins Wholesale Applications Community' Trading Markets (press release) WAC launches corporate entity; joins with jil rcr wireless
Internet Betting Gets Bigger as Online Gambling Companies Merge - New York Times
nytimes.com
Internet Betting Gets Bigger as Online Gambling Companies Merge - New York Times
Thu, 29 Jul 2010 18:53:36 GMT+00:00
New York Times paris two of the biggest European operators of Internet betting sites, PartyGaming and Bwin Interactive Entertainment, said Thursday that ... PartyGaming, Bwin Merge Wall Street Journal PartyGaming, Bwin Shares Soar On Merger Plan Wall Street Journal Bwin and PartyGaming Come Together as One Online-Casinos.com
Energy Bills Appear Manageable for Small Deepwater Operators Like ATP Oil and Gas - GuruFocus.com
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Energy Bills Appear Manageable for Small Deepwater Operators Like ATP Oil and Gas - GuruFocus.com
Wed, 28 Jul 2010 18:15:35 GMT+00:00
Like ATP Oil and Gas GuruFocus.com I've followed independent Deepwater operator ATP Oil and Gas closely over the past couple of years and have a sizable position in the company stock. ...

From Google News Search: "Operators"
Thu Jul 29 16:09:42 2010

Is it true that ham radio operators bounce signals off of the moon?
Q. I know that lasers are bounced off of retroreflectors left on the moon, but why do that if ham radio operators have done it for years? Have they?
Asked by Jimbacsi - Sat Aug 30 12:09:11 2008 - - 5 Answers - 1 Comments

A. sure. this is well documented. they even have contests to see who can talk to the most stations that way. they're been doing it for years. some hams who were using the 2.3 ghz ham band for this tuned their gear down to 2.28 ghz and listened to apollo missions. the reason they go to all the trouble of using the apollo reflectors for ranging is to get coherent signals off the moon they can measure. ham radio signals illuminate most of teh moon, bounce off innumerable mountains and boulders, and are not all the useful for measurement by the time they get back to earth.
Answered by Tina L - Sat Aug 30 14:32:07 2008

Is it legal to make checkout operators pay the difference if their till is short?
Q. The operators don't get the money if their till is over but have to repay the difference if they are short
Asked by Sahboz - Sat Aug 1 00:01:08 2009 - - 3 Answers - 0 Comments

A. it depends on agreements. for instance, if you drive for domino's you must agree to take a 'bank' to make change for cash sales and be responsible for all of you sles at the end of the night. so yes, you are responsible for any shortage as you are the only person with access to that cash. they also provide you w/ a locked drop box so as to limit the amount of money you carry to ewach delivery. and yes, you do get to keep the overage as it is a tipping industry. so in answer, it really depends on the acceptance of the job and any strings attached, but generally as a rule, no, but they can fire you for being short too often usually.
Answered by ez80227 - Sat Aug 1 00:07:04 2009

Whats happened to the elevator operators?
Q. In old movies I always see a guy that operates the elevators. Why did he have to do that. And why don't we have elevator operators now? In the future do yo believe most menial jobs will be replaced by robots?
Asked by Ashur - Mon Dec 1 17:40:29 2008 - - 15 Answers - 1 Comments

A. Elevators became self operating in the last half of the twentieth century. Older elevators had to be started and stopped manually as they had to be controlled to stop in an exact spot each time. Once in a while the operator would tell riders to watch their step as the car might have been a little lower than the floor and he wouldn't want them to trip when exiting.
Answered by Bambi Berkowicz - Mon Dec 1 17:45:12 2008

From Yahoo Answer Search: "Operators"
Tue Jul 6 19:35:52 2010

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Wed Jun 23 10:42:13 2010