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# Convergence criteria
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There are two parameters controlling the computation accuracy of the solution:
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```bash
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energyconveps 1.0e-6 # energy convergence epsilon
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# energy changes between two subsequent iteration
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# expressed in units E_ffg needs to be smaller than npartconveps
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# for converged solution
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# default=1.0e-6
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npartconveps 1.0e-6 # number of particles convergence epsilon
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# relative difference between obtained particle number
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# and total particle number must be smaller than npartconveps
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# for converged solution
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# default=1.0e-6
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```
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The solution is regarded as *converged* when all contributions to the energy satisfy `energyconvep` and particle number satisfies criteria `npartconveps`. Info about the status of convergence is printed on standard output.
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Example of a report for converged solution for input parameters:
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```bash
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Na 17 # requested particle number, spin-a
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Nb 18 # requested particle number, spin-b
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energyconveps 1.0e-6 # energy convergence epsilon
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npartconveps 1.0e-6 # number of particles convergence epsilon
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```
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may look like:
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```
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# CONVERGENCE REPORT PARTICLE NUMBER: it=58
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SPINA: NEW= 17 OLD= 17.000003 DIFF= -3.1644056e-06 CONVSTATUS= PASS NPARTCONV= 2.1975596e-09
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SPINB: NEW= 18.000001 OLD= 17.999995 DIFF= 5.4727832e-06 CONVSTATUS= PASS NPARTCONV= 2.406396e-08
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# CONVERGENCE REPORT ENERGY: it=58
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E_kin: NEW= 1.879979 OLD= 1.8799781 DIFF= 8.9986865e-07 CONVSTATUS= PASS
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E_pot: NEW= -0.51360103 OLD= -0.51360098 DIFF= -4.7134213e-08 CONVSTATUS= PASS
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E_pair: NEW= -0.94237189 OLD= -0.94237177 DIFF= -1.2408755e-07 CONVSTATUS= PASS
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E_curr: NEW= 3.5892537e-14 OLD= 9.6882531e-14 DIFF= -6.0989994e-14 CONVSTATUS= PASS
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E_potext: NEW= 0 OLD= 0 DIFF= 0 CONVSTATUS= PASS
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E_pairext: NEW= 0 OLD= 0 DIFF= 0 CONVSTATUS= PASS
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E_velext: NEW= 0 OLD= 0 DIFF= 0 CONVSTATUS= PASS
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------------------------------------------------------------------------------------------
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E_tot: NEW= 0.42400609 OLD= 0.42400536 DIFF= 7.2864682e-07 CONVSTATUS= PASS
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```
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# Ajusting of chemical potentials
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TODO |
