In set theory , this is a theorem guaranteeing that recursively defined functions exist. Given a set * X* , an element * a* of * X* and a function
f
:
X
→
X
{\displaystyle f:X\rightarrow X}
, the theorem states that there is a unique function
F
:
N
→
X
{\displaystyle F:\mathbb {N} \rightarrow X}
(where
N
{\displaystyle \mathbb {N} }
denotes the set of natural numbers including zero) such that

Ebat, If a system can’t recover 100s of files from the waste bin ( probably at least half a million files on a modern computer) you have more than just an indexing problem. If you doubt the speed advantages of simply re-indexing the 100s of recovered or copied files you might want to try googling “my computer has spent 2 days rebuilding the search index” then you may realise why re-indexing everything is not such a good idea.

I accept that moving the files to an alternate location is a feasible alternative but can anybody put their hand on their heart and say ” My CD,DVD,Memory Stick, Smart Card is more reliable than my computer’s hard disk”? If they can, then they probably have inferior hard disks in the first place. Simply check the manufacturers’ figures for MTBF (mean time between failures) for any storage device and compare the results.

I am very happy to receive reading your proposed viva questions which I realized they are useful for any viva candidates who are preparing to present it, like me, my viva is just in a comer which I wish to have such important suggested general questions of a viva. However, I would like you if possible to suggest for me some viva questions on my field which you think they may be raised by the committee and which you may think possibly may be. Therefore, I need your advice. My PhD thesis on a African Foreign Policy in terms of regional policies and national development. if there is any recommendations or

tips? Cheers!

thank you so much