What makes a problem an ill posed problem?
An ill posed problem is one which doesn’t meet the three Hadamard criteria for being well posed. These criteria are: Having a solution that depends continuously on the parameters or input data. A problem which is not well posed is considered ill posed. Many first order differential equations and inverse problems are ill posed.
When do you regularize an ill posed problem?
An ill posed problem will often need to be regularized or re-formulated before you can give it a full numerical analysis using computer algorithms or other computational methods. Reformulation often involves bringing in new assumptions to fully define the problem and narrow it down.
Why are so many inverse problems ill posed?
As this violates rule 2 of the Hadamard criteria, the problem is ill posed. Many inverse problems are ill-posed because either they don’t have a solution everywhere, their solution is not unique, or their solution is not stable (continuous).
What does it mean when Doctor says you don’t have a disease?
In other words, presenting with a set of symptoms that are unusual or atypical for a particular disease doesn’t mean that you don’t have that disease, especially if that disease is common. Or as one of my medical school teachers put it: “A patient’s body frequently fails to read the textbook.”
Where does the saying no problem come from?
In the U.S., Americans even use the slang “No problemo,” a bastardization of the more correct Spanish phrase, “No hay problema,” or “Ningún problema.” Is that where we get it? The more we hear and see the term used – even in movies — the more correct we think it is.
What to do when someone says no problem?
1. Post a comment in the area below to show support of my efforts. I’d love to know I’m not alone. 2. Share your own stories about situations you’ve encountered where you heard the words “No problem” in lieu of what you think would have been a better choice of words.
What’s the correct response to ” no problem “?
The correct response… one more time is “You’re welcome,” or “It’s my pleasure.” I’m declaring a personal crusade to stamp out the use of “No problem” in our society. Henceforth, this subject will be a standard item in all my seminars and presentations, as are a few other topics, such as writing thank you notes.
When do you say ” no problem ” to a cashier?
And sadly, I hear them all too often. Cashiers say “No problem” after I thank them for the change I receive for my purchase. Waiters say “No problem” when giving me change from the bill I just paid. Front desk attendants say “No problem” after I thank them for giving me my room key.