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I'm actually reading the article of Shastry "Exact solution of an S= 1/2 Heisenberg Antiferromagnetic Chain with Long-rnaged interactions", Phys. Rev. Lett. 60, 639 (1988)" The articles shows how to solve the problem of a long range-inverse squared interacting spin chain, i'm having troubles with equations 5 and 6 of the article, i tried everything but could not find the same result ! if someone knows how it goes, i'm here to discuss, Thanks !

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  • $\begingroup$ It would be best to type the equations into the question (using Mathjax not an image -images of equations and pages are strongly discouraged on Physics SE and Mathjax is the standard ). $\endgroup$ – StephenG May 14 at 13:17
  • $\begingroup$ Could you show your work? It isn't clear what having "tried everything" means... $\endgroup$ – Anyon May 16 at 13:20

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