Frequently Asked Questions...
In a compact space X with metric d. True that for d(x,y)>=e iff B(x,e/2) and B(y,e/2) don't intersect?
B(x,e/2) is the open ball of radius e/2 centered at x.
Answer:
False actually. It is true that d(x, y)≥e implies that B(x, e/2)∩B(y, e/2) = ∅, however there are compact metric spaces where B(x, e/2)∩B(y, e/2) = ∅ yet d(x, y) Topology #4 Open Balls Here are a list of other products on Woodturning Tools, come check these out:
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16006 Open Bearing 30x55x9 Ball Bearings
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6202 Nachi Bearing Open C3 Japan 15x35x11 Ball Bearings
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16009 Open Ball Bearing 45x75x10 Ball Bearings
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16008 Open Ball Bearing 40x68x9 Ball Bearings
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6207 Nachi Bearing Open C3 Japan 35x72x17 Ball Bearings
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16007 Open Ball Bearing 35x62x9 Ball Bearings
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6209 Nachi Bearing Open C3 Japan 45x85x19 Ball Bearings
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6234 Nachi Bearing Open C3 Japan 170x310x52 Extra Large Ball Bearings
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6238 Nachi Bearing Open C3 Japan 190x340x55 Extra Large Ball Bearings
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6300 Nachi Bearing Open C3 Japan 10x35x11 Ball Bearings
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6302 Nachi Bearing Open C3 Japan 15x42x13 Ball Bearings
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6303 Nachi Bearing Open C3 Japan 17x47x14 Ball Bearings
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6304 Nachi Bearing Open C3 Japan 20x52x15 Ball Bearings
US $7.88
Open Ball
