Is there a way to assign values to objects such that if you sum some values you can figure out the objects just from the sum? For example, if values are $10, $15, $20, $25, and $30, but you're given just a sum of $40, you don't know whether it's $10 and $30, or $15 and $25.
For each decimal you can use e.g. 2, 3, 4 9 = all 3 items 5 = 2+3 6= 2+4 7 = 3+4 So did instance 9.53 tells you: 2+3+4+0.2+0.3+0.03 (unique) This assumes each item can only appear once
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For instance*
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I'm saying you should only use exactly this set of numbers -- 2,3,4. So you can store 3 items per decimal. With a float32 you can store presence indicators for over 200 unique items
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