going

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.

View More On Wikipedia.org
Recent contents Top users
  1. P

    My customer is going to give me a ride on his Willy

    It's an American Willy Jeep from WW2 It makes a right racket, perfectly resored. Can't wait.
  2. L

    sleeve for plastic barrier pipe in screed ?

    Hello, i need to put some rad pipes in for our extension, i was going to use JG speed fit. for a sleeve i was going to buy a few lengths of 25mm plastic conduit and some sweeping bends so there is no joins in the floor. any probs with that ? thanks
  3. R

    Going Oil (certification)

    Hi guys and girls, quite a while since I've posted. Been working hard and saving as much as possible starting my business, getting it going, to go through with getting my Oil certificates (+ equipment for servicing etc). I've had a look at the average cost of the courses and see there are...
  4. J

    Going self employed

    I am thinking of registering as self employed but staying full time where I am until I get the the point I have enough work to go on my own. I have been working doing plumbing and general building work for nearly 6 years with a company and want to start advertising instead of relying on...
  5. U

    Combi boiler - Hot water keeps going cold

    We rent a flat with a Vokera combi boiler, sometimes we had to manually turn the central heating on to get hot water out of the taps or shower, more recently the hot water has quickly run cold, then warm, then cold, and so on, even with the central heating switch on. The pressure on the boiler...
    • Unregistered
    • Thread
    • boiler cold combi combi boiler going hot hot water keeps oil water
    • Replies: 10
    • Forum: Plumbing Jobs | The Job-board
  6. rpm

    Help - Thinking of going it alone in a new area.

    Evening all, Most of my working life I`ve worked on pumps both commercial and domestic and for the last +10yrs I`ve worked on Saniflo macerators and other makes of small pumps for different companies as PAYE, I have tried to get my own area as an official sani engineer where you are on their...
  7. A

    Four pipes going into tap

    Hello again, My kitchen sink tap has 4 pipes going into it. I need to buy a new tap but can't seem to find anything like it online. Do these even exist? Why would there be 4 pipes going in there? (I have a little water heater in the cupboard under the sink. 1 cold and hot come from the boiler...
  8. A

    4 pipes going into tap

    Hi there, I'm not an actual plumber, just doing some DIY around my house but I've come across something that it seems I can't find any information on on the internet. My kitchen zink tap has 4 pipes going into it. I need to buy a new tap but can't seem to find anything like it online. Do...
  9. L

    Pressure Loss - Loose end please help!!!

    Hi Everyone, I moved into a new flat about 18 months ago. After a few months the boiler pressure started dropping to 0 daily which I just repressurized as needed. The boiler eventually stopped working all together (old) so had a new BAXI combi boiler put in. Since day one had the same...
    • lukesaw
    • Thread
    • boiler filling going help loose please pressure pressure loss which
    • Replies: 17
    • Forum: Plumbing Jobs | The Job-board
  10. M

    going limited....pro's and cons?? advice needed

    evenin chaps, I contract to a certain firm and get paid by the job, now according to new rules my tax is going to be stopped at source which will be a bit rubbish for me.....but have been told that if Im limited this wouldn't be the case. I know nothing on going limited so wondered if any of...
  11. F

    Rads/hot water keeps going off??

    Hi, I wonder if anyone can help me with a problem I have had for the last month or so. I have an oil (Kero) central heating system which keeps going cold for both hot water and radiators. I have a mid position valve, 3 speed pump and a vertical tube with vent on the end at the back of...
    • Freezing2
    • Thread
    • central heating system cold radiator going header hot rads keeps screw system water
    • Replies: 12
    • Forum: Plumbing Jobs | The Job-board
  12. U

    Rads/hot water keeps going off??

    Hi, I wonder if anyone can help me with a problem I have had for the last month or so. I have an oil (Kero) central heating system which keeps going cold for both hot water and radiators. I have a mid position valve, 3 speed pump and a vertical tube with vent on the end at the back of...
    • Unregistered
    • Thread
    • central central heating system cold radiator going hot rads keeps register system valve water
    • Replies: 2
    • Forum: Plumbing Jobs | The Job-board
  13. C

    Home heating.. What do the valves do?

    Hi all, I'm after a bit of help understanding how things are plumbed in. I have a hot water tank in the roof and a cylinder in the cupboard upstairs. In this cupboard is a electric emersion heater going into the cylinder which is always off. Then we have the pipework going here and there with...
  14. R

    Panic stations please

    https://www.************/onthetools/videos/1698108063808406/ Oops!!
  15. D

    Going to be a loooooooong day!

    Up at half three to get to the airport to fly to Luton to look at a job in Hitchin. I'll probably get back about half nine tonight. Woe betide any idiots, I think my tolerance for fools will be at a very low ebb.....
  16. F

    Radiators keep going cold

    Hi I've just moved and the radiators come on with the combi boiler. It is timer only controlled (no thermostat), some radiators have controls and some seem to be broken off! within about 1hour of the boiler turning off the radiator are stone cold. Any advice/ suggestions welcomed Thx Faith
  17. K

    Dodgy oil tanks

    Hi I think you guys will enjoy these just some of the dodgy oil tanks I've found in my travels. Ryan Ps. Sorry for them being sideways.
  18. J

    Vaillant ecotec 418 wiring

    Hi lads. Having some issues with the wiring of the above boiler. I've run a new live neutral earth to the boiler from the fused spur via the wiring centre. I always thought the pump was switched with the orange on the 3 port. Now the pump live is seperate do I run the pump direct to boilers pump...
  19. Inverness

    Rothenberger olive cutters

    Any one had problems with it breaking?
  20. C

    my pressure is going up while heating is on ?

    Can some one tell me what is causing this we have just had a new pump put on thanks in advance

Newest Plumbing Threads

Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock