20201127 11:33:16 +0200  received badge  ● Popular Question (source) 
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20180202 05:03:13 +0200  asked a question  Listing fractions Hi, I would like to request help in listing rational numbers. For motivation, the command
outputs the integers from 1 through 9. Is there a similar command for listing out rational numbers a/b with a and b in the range (x1,y1) and (x2,y2), respectively. For instance, if a is in range (1,3) and b is in (4,6), I want to return
On a related note, how can one impose a gcd(x,y)==1 in the following list?

20180121 06:37:05 +0200  received badge  ● Student (source) 
20180121 06:29:44 +0200  asked a question  SteinWatkins Database of Elliptic Curves With the Cremona database, sage can list ranks of elliptic curves of conductor in an interval [a,b]. For instance, [(E.ainvs(), E.rank()) for E in cremona_curves(srange(a,b))] Can the same be done on sage with the SteinWatkins database? 
20180121 06:29:44 +0200  asked a question  SteinWatkins Database of Elliptic Curves With the Cremona database, sage can list ranks of elliptic curves of conductor in an interval [a,b]. For instance, [(E.ainvs(), E.rank()) for E in cremona_curves(srange(a,b))] Can the same be done on sage with the SteinWatkins database? 