Skip to main content
雨が好きな人's user avatar
雨が好きな人's user avatar
雨が好きな人's user avatar
雨が好きな人
  • Member for 7 years, 1 month
  • Last seen more than a month ago
  • Cambridge, United Kingdom
6 votes
1 answer
556 views

How does this integration work when solving a DE?

2 votes
1 answer
407 views

Is there some way of proving that this simple pattern tiles the plane? Is a formal proof even necessary?

2 votes
1 answer
191 views

Take two numbers x and y between 1 and 100. What’s the probability that x/y is an integer?

2 votes
0 answers
93 views

Is this true for cosets of normal subgroups?

1 vote
1 answer
63 views

Are there other simple conditions we can use to demonstrate the non-existence of a universal set?

1 vote
1 answer
116 views

Does there exist a composite, deficient, odd number that is divisible by the sum of its proper factors?

1 vote
1 answer
177 views

Any convergent sequence is bounded. Don’t we need to use the absolute value in this proof?

1 vote
0 answers
98 views

What kind of infinity is the number of different infinities? [duplicate]

0 votes
1 answer
114 views

How many pairs of guests should we expect to only have to swap places?

0 votes
0 answers
46 views

Why can't we choose a simpler bound in this proof?