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In commutative algebra, a branch of mathematics, going up and going down are terms which refer to certain properties of chains of prime ideals in integral extensions.
The phrase going up refers to the case when a chain can be extended by "upward inclusion", while going down refers to the case when a chain can be extended by "downward inclusion".
The major results are the Cohen–Seidenberg theorems, which were proved by Irvin S. Cohen and Abraham Seidenberg. These are known as the going-up and going-down theorems.

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  1. M

    Going back to college to do nvq level 3

    I have worked in the plumbing industry for about 8 years. Were I work are putting me through my gas. To do this because of the high cost of the gas training centres and me wanting to get my NVQ level 3. They are sending me to college 1 day a week to do this. I feel I get more qualifications from...
  2. M

    Going commercial?

    Currently only work on domestic. Got a job replacing light commercial boiler in domestic premises. Though it would be good to get my commercial ticket so I can do the work. Questions: I'm paying £760 for ; CODCN01 CIGA1 lCPN1 TPCP1A is this a good price? It's in London. Also, how much...
  3. L

    At last.......... they will all be going home :)

    It has been a nightmare summer, seems the world has stayed in the UK and not gone abroad, great for hoteliers etc but a pig if you just want to go from A to B. Why do people on holiday seem to drive at 12mph brake, manovere then indicate. Better still stop in the left turn lane at the...
  4. U

    Heat Slave 15/19 Oil Boiler Hot Water Random

    Hi, Moved to a house in Devon and we have a big Heat Slave 15/19 in the corner of the garage. Looks ok, heats the house, but hot water is another story! It can sometimes be fine and showers/taps will run hot water for England, but on occasions the hot water stops and takes time to kick in...
    • Unregistered
    • Thread
    • boiler fires going heat hot hot water oil oil boiler random stops switch water
    • Replies: 3
    • Forum: Plumbing Jobs | The Job-board
  5. L

    going off now to learn to drive this...........:)

    nice day for a drive...........
  6. Simon F

    Halstead combi, spark but going to lock out

    halstead combi finest gold 47-333-07 getting a spark but failing to fire up, going to lock out after 3 attempts. faulty gas valve?? no gas pressure at burner whilst sparking possible fault with diverter valve, water has been temperamental but is improved by firing heating up. ( before...
  7. R

    Hello, need advice on going self employed

    Hello, Not sure if this is the right place to post? but I'm after advice on setting up on my own.. I have worked for British gas as a technical engineer (service and repair) for the last nine years, I have enjoyed the job, I've gained a good level of experience on fixing and servicing...
  8. N

    Is the quality of tradesmen going downhill.

    As someone who started in the industry in 1974 am I right in thinking in general the quality of lads on the tools is dropping. In my day to day job I have to put these guys to work and am finding standards and work ethic is not what it was. Don't get me wrong there are some good-uns, but alot...
  9. G

    Where is the water going Condenser/dryer?

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  10. MarkAqua

    New Header going in

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  11. J

    Removing bath with existing tiles and new vinyl flooring

    Hi all, I just quoted for a job to replace a corner bath for a straight 1500mm bath. I worked there before doing a vanity unit and new wc and other bits. At the time I said you may as well change your bath etc. money was tight so they never went through with it. However in the mean time they've...
  12. A

    Gas sniffer

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  13. P

    Mystery pipe

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  14. E

    Why does the hot water keep going off when I turn the tap on in the kitchen?

    It doesn't happen every time I turn the tap on... It's a vaillant boiler about 20 years old located in upstairs bathroom. I've had it serviced a couple of times over the last five years since I've been at the property. Can't seem to find a plumber who can fix it. Thanks
  15. G

    Going self employed

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  16. K

    Checkatrade?

    On another subject here but do any of you boys use checkatrade to promote your business? I never have and all my work prior to me moving from London to Devon where i'am now was generally through word of mouth and my old website via Google. I had a meeting with them last week, checked out all my...
  17. 8

    Baxi Solo 2 40 RS Pilot Keeps Going out

    The pilot light lights but then goes out after about 30 secs. Is this likely to be an issue with the thermocouple or another part?
  18. 8

    Baxi Solo 2 40 RS Pilot Keeps Going out

    The pilot light then goes out after about 30 secs. Is this likely to be an issue with the thermocouple or another part?
  19. U

    Shower pump problem

    Fitted a bathroom about 2 years ago, customer rung me up today saying the shower isn't working. Quickly called in tonight to take a look, powers there but pump won't kick in unless I suck on the hose as soon as you switch it off and try again nothing. Going back this week to have a proper look...
  20. M

    Going ltd.

    Just been on the phone about subbing to British gas and I have been told that I need to go ltd. Is this true? What is involved with it? Does it cost anything? I'm going to speak to my dad (accountant) about it tonight.
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