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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. T

    Plumfix = waste of time

    I started using plumbfix as is next door to my gym that I go to every morning so it's dead handy "you get a discount on all plumbing stuff" what a load of pony!!!!!! Fittings and pipe yes! Every set of taps I have got from them NO shower mixer last week NO final straw rang to check availability...
  2. S

    Unvented Hot Water Cylinder issues .....

    Morning Guys. After some help/advice. We we have recently moved into a rental property with the following set up .... - Ideal Logic heat 12 boiler (Kitchen) - Danfoss dual CH and HW electronic controller (under boiler) - Range Tribune HE Cylinder (Airing Cupboard) For some reason the...
    • Stevern87
    • Thread
    • boiler cupboard cylinder going hot hot water hot water cylinder issues switch unvented water
    • Replies: 4
    • Forum: Plumbing Jobs | The Job-board
  3. P

    Gas pipe going through flat felt roof

    After some advice guys what do you lot use to seal round the pipe to stop the water leaking through the roof ?
  4. J

    Going ltd

    Finally off loaded all my book keeping and payroll to an accountant and from the 6th april going ltd. i dont know why but i was really dreading doing this, but she sold it to me really well and i feel hell of a lot better now than i did before. it was getting to much and to be honest it will...
  5. I

    Going to do an HNC/D in HVAC

    Figured it was about time to learn design (see what i did there :P ) Anyone else done one?
  6. T

    Stumped - can you guys bend your head around this one - water going from the loo

    Can't fathom this one - what d'ya think? Water is pulled from toilet u bend, have replaced the durgo valve, tried it with no valve and tried it with vent pipe sealed - no difference, water is pulled out over apx 30 mins. I can see down the vent pipe and can see the water leaving when...
  7. N

    Going LPG

    Is it much of a chew on getting LPG added Whats involved in gaining LPG for caravans etc. Currently NG only
  8. V

    What On Earth Is Going ON?

    Sent my Anton analyser in for calibration. Have just received an email for bill of £288? I think it would have been cheaper to buy a new one. What a cheek. I think I have to consider using a different company or use Anton. I'm not impressed. The said company has been doing the calibration for...
  9. M

    |I'm going to become a sparkie..

    And play with black insulation tape all day... Black Tape Project | The evolution in Fashion Best only click on the link in private.... :D
  10. B

    Adding another bathroom - do I need to upgrade or can the current system cope?

    xxxxx
    • binnie
    • Thread
    • adding another bathroom building current existing going system upgrade waste
    • Replies: 4
    • Forum: Plumbing Jobs | The Job-board
  11. Meady

    It's going to be a long week :(

    Off to college tomorrow to re do my gas courses. I've been off work for 10 weeks after a knee operation so it's going to be a hard week going from sittin. around the house all day doing nothing to being at college all day. Wish me luck :)
  12. T

    Going gas safe

    Hi My new year resolution is to get my gas safe :-) i retrained after many unhappy years and done a c&g level 2 and love my work now, love being self employed love the respect from customers and love the job satisfaction I am in 2 minds to just give the training center my money for my gas...
  13. B

    Glow worm hideaway 100B - pilot keeps going out

    Hi guys, customer has a glowworm hideaway 100B BF and the pilot keeps going out. Been to relight it a few times and I fires up straight away. Thinking the gas valve might be faulty as thermocouple has been replaced. The customer however has now told me that everytime the pilot goes out. Her 2...
  14. G

    Going to add new rad to system.......

    Hi Guys, Sorry if there is any similar thread but can't find myself at the moment, so decide to ask out loud. Have a gas boiler Potterton Promax Combi28HE A Plus (output 28kW) I need to add one more radiator to the system. I have already 7 rads in the house. upstairs 4 x single panels and...
  15. Kewat66

    Ideal ISAR M30100 flame going out

    Hi All, i am looking at a fault on an ISAR M30100. Boiler fires up ok but after a few hours it goes out and comes up with an LF code. I am thinking of changing the flame sensor as it seems similar to the manual suggestion but this states the boiler goes out after 10 seconds. Is there anything...
  16. M

    How do you deal with going on holiday?

    The title says it, but it's mainly aimed at folks with staff, but where you are the thing that holds it all together. I have regular contracts and some staff, but when I go away it's the most stressful time ever. Who do you get to deal with things in your absence? martin
  17. cr0ft

    Am I going mad on this?

    Hi all, I've just had a gas fitter round tonight who is going to be fitting the boiler for us on this property renovation job. The cylinder which is going to remain is a new open vented indirect cylinder. I want to fit a system boiler in the loft which will obviously remove the need for the...
  18. R

    Tool bags

    Recently changed to the Stanley Fatmax rigid bag but today it's gone pop. only had it 3 months and it wasn't long before it started going out of shape and tearing at seams. Before that I went through of couple of years with numerous CK open totes. Definetly not going for another Stanley. Think...
  19. M

    do I need to wrap (duct tape) or sleeve, plastic piping going into concrete floor?

    hi just wondering which is the best way to go about it, have a radiator to be fitted in a conservatory and the customer wants it to be chased into the concrete floor.
  20. C

    Electricians

    hi everyone I am posting this in frustration of bloody electricians, i am getting to the stage that i won't work when they are in the vicinity. was on a job the other day and electrician went absolutely daft on my pipe run - said it was going to interfere with his wire run this happens almost...
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