An Improved Method for the Numerical Solution of the Suspension Bridge Deflection Equations

R. W. Dickey
1968 Mathematics of Computation  
tract DA-31-124- it was shown that in the case of constant live and dead loads there were infinitely many 'compressive' solutions, but only one solution with H + h > 0, i.e. corresponding to a tension in the cable.
doi:10.2307/2004660 fatcat:gfuehrxqlvhavj7vftawsno4dq