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Fix scaling in (S/D)TGSNA, fix #103, thanks to @elivanova #830

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Merged
merged 1 commit into from
May 24, 2023
Merged

Fix scaling in (S/D)TGSNA, fix #103, thanks to @elivanova #830

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2 changes: 1 addition & 1 deletion SRC/dtgsna.f
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Original file line number Diff line number Diff line change
Expand Up @@ -632,8 +632,8 @@ SUBROUTINE DTGSNA( JOB, HOWMNY, SELECT, N, A, LDA, B, LDB, VL,
C1 = TWO*( ALPHAR*ALPHAR+ALPHAI*ALPHAI+BETA*BETA )
C2 = FOUR*BETA*BETA*ALPHAI*ALPHAI
ROOT1 = C1 + SQRT( C1*C1-4.0D0*C2 )
ROOT2 = C2 / ROOT1
ROOT1 = ROOT1 / TWO
ROOT2 = C2 / ROOT1
COND = MIN( SQRT( ROOT1 ), SQRT( ROOT2 ) )
END IF
*
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2 changes: 1 addition & 1 deletion SRC/stgsna.f
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Original file line number Diff line number Diff line change
Expand Up @@ -632,8 +632,8 @@ SUBROUTINE STGSNA( JOB, HOWMNY, SELECT, N, A, LDA, B, LDB, VL,
C1 = TWO*( ALPHAR*ALPHAR+ALPHAI*ALPHAI+BETA*BETA )
C2 = FOUR*BETA*BETA*ALPHAI*ALPHAI
ROOT1 = C1 + SQRT( C1*C1-4.0*C2 )
ROOT2 = C2 / ROOT1
ROOT1 = ROOT1 / TWO
ROOT2 = C2 / ROOT1
COND = MIN( SQRT( ROOT1 ), SQRT( ROOT2 ) )
END IF
*
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