Repository navigation

Cheaper colour sum: DDM colour basis, Kleiss-Kuijf flows, and the same for madmatrix - #60

Merged

oliviermattelaer merged 65 commits into

mainfrom

claude/dixon-maltoni-gluon-basis-69e1d7

Sep 10, 2026

Commits on Aug 5, 2026
- exploit index-permutation symmetry in the color basis and color matrix
  
  oliviermattelaer
  and
  claude
  committed
  2f8aeaa
Commits on Aug 6, 2026
- index the JAMP matrix instead of scanning every column of it
  
  oliviermattelaer
  and
  claude
  committed
  dab4a8d
- build the powers of Nc in the JAMP coefficients once per power
  
  oliviermattelaer
  and
  claude
  committed
  0911a2d
- encode the color matrix by one line per orbit, and split the contraction sum
  
  oliviermattelaer
  and
  claude
  committed
  390c493
- look for the JAMP sub-expressions by orbits of the color basis symmetry
  
  oliviermattelaer
  and
  claude
  committed
  b66e13e
- carry the color flow factors as powers of i, not as signs
  
  oliviermattelaer
  and
  claude
  committed
  bb8b465
- write the color flow definitions out as tables, keeping the orbit optimisation
  
  oliviermattelaer
  and
  claude
  committed
  e4f76be
- finish the color flow optimisation with the plain scan
  
  oliviermattelaer
  and
  claude
  committed
  d21bdad
- keep whichever of the two optimisations is the shorter, on small processes
  
  oliviermattelaer
  and
  claude
  committed
  7c659b5
- use the orbit equivariant optimisation for madevent too
  
  oliviermattelaer
  and
  claude
  committed
  d253574
- read the amplitudes into a buffer so madevent can use the tables too
  
  oliviermattelaer
  and
  claude
  committed
  c840ec0
- find the reversal symmetry of the color basis and fold the color matrix on it
  
  oliviermattelaer
  and
  claude
  committed
  018e56b
- sum |M|^2 over one color flow per reversal pair
  
  oliviermattelaer
  and
  claude
  committed
  04ce4e0
- work out one color flow per reversal pair and copy the other
  
  oliviermattelaer
  and
  claude
  committed
  48ab222
- Revert "work out one color flow per reversal pair and copy the other"
  oliviermattelaer
  committed
  e965843
- fold the color matrix only where the template sums over the pairs
  
  oliviermattelaer
  and
  claude
  committed
  386a3ff
- carry the folded color sum in the madevent templates, switched off
  
  oliviermattelaer
  and
  claude
  committed
  d26858b
Commits on Aug 7, 2026
- gather the folded color flows without opening a block
  
  oliviermattelaer
  and
  claude
  committed
  10a1dad
- sum |M|^2 with real arithmetic
  
  oliviermattelaer
  and
  claude
  committed
  9fe3443
- refresh the madevent references for the folded color sum
  
  oliviermattelaer
  and
  claude
  committed
  ee8a18b
- Revert "sum |M|^2 with real arithmetic"
  oliviermattelaer
  committed
  b7291d7
- walk whole numbers when every coefficient shares its power of i
  
  oliviermattelaer
  and
  claude
  committed
  58879ec
- sum the color for every helicity at once, through BLAS
  
  oliviermattelaer
  and
  claude
  committed
  990cd7f
- leave the helicity guard alone when BLAS is off
  
  oliviermattelaer
  and
  claude
  committed
  b33129e
- drop the INIT_CF call that belongs to another session
  
  oliviermattelaer
  and
  claude
  committed
  6be84b4
- give madevent the common block its color matrix is rebuilt into
  
  oliviermattelaer
  and
  claude
  committed
  2b26e0e
- Merge branch 'claude/colour-reflection' into claude/gracious-moser-253876
  oliviermattelaer
  committed
  49aa8a3
- put the stored IOTest references back
  
  oliviermattelaer
  and
  claude
  committed
  c99a102
- Merge branch 'claude/madevent-init-cf' into claude/gracious-moser-253876
  oliviermattelaer
  committed
  27b7d3a
- regenerate the three stored comparison files
  oliviermattelaer
  committed
  f889950
- sum the color of every helicity in one batched BLAS-3 call, for madevent
  
  oliviermattelaer
  and
  claude
  committed
  7fd3a33
- mg7: keep the flavors carried by processes mapped onto one matrix element
  
  oliviermattelaer
  and
  claude
  committed
  7614a93
- make a failed run fail as a failed run, not as a disagreement
  
  oliviermattelaer
  and
  claude
  committed
  eca43df
- build the (n-2)! Del Duca-Dixon-Maltoni basis for multi-gluon processes
  
  oliviermattelaer
  and
  claude
  committed
  ab161ac
- give standalone the same color flow work as madevent
  
  oliviermattelaer
  and
  claude
  committed
  7487ad5
- Merge branch 'claude/madevent-blas-colour-sum' into claude/dixon-maltoni-gluon-basis-69e1d7
  oliviermattelaer
  committed
  adeb002
- give madmatrix the DDM color basis and the Kleiss-Kuijf color flows
  
  oliviermattelaer
  and
  claude
  committed
  6f559c3
- fold the madmatrix color sum onto one flow per reversal pair
  
  oliviermattelaer
  and
  claude
  committed
  ed00d1a
- give the madmatrix color flows the sub-expressions the fortran ones have
  
  oliviermattelaer
  and
  claude
  committed
  4ca220c
- fix the FPTYPE=f build of the madmatrix check_sa driver
  
  oliviermattelaer
  and
  claude
  committed
  332bf68
- send the C++ color sum through a host BLAS
  
  oliviermattelaer
  and
  claude
  committed
  20446e4
- Merge branch 'claude/competent-haslett-2092a6' into claude/madmatrix-cpu-blas
  oliviermattelaer
  committed
  449de54
- Merge branch 'claude/madmatrix-cpu-blas' into claude/dixon-maltoni-gluon-basis-69e1d7
  oliviermattelaer
  committed
  e93f684
- Merge branch 'claude/madmatrix-colour-fold' into claude/dixon-maltoni-gluon-basis-69e1d7
  oliviermattelaer
  committed
  4bb8e20
- fold the cuBLAS color sum onto one flow per reversal pair
  
  oliviermattelaer
  and
  claude
  committed
  4bdf039
- Merge branch 'claude/madmatrix-jamp-cse' into claude/dixon-maltoni-gluon-basis-69e1d7
  oliviermattelaer
  committed
  ed9f672
- Merge branch 'claude/cranky-franklin-bc7ec5' into claude/dixon-maltoni-gluon-basis-69e1d7
  oliviermattelaer
  committed
  1852bf7
- share the orbit equivariant color-flow search with the madmatrix backend
  
  oliviermattelaer
  and
  claude
  committed
  d718ce8
Commits on Aug 9, 2026
- mg7: pick the color flow from a mask built on the color flow basis
  
  oliviermattelaer
  and
  claude
  committed
  467862f
- hel_recycle: never wrap a statement onto a blank physical line
  
  oliviermattelaer
  and
  claude
  committed
  9f984d9
Commits on Aug 11, 2026
- drop the batched BLAS-3 color sum from madevent
  
  oliviermattelaer
  and
  claude
  committed
  b2b6d13
- drop the batched BLAS-3 color sum from the fortran standalone
  
  oliviermattelaer
  and
  claude
  committed
  bfc5a08
Commits on Aug 12, 2026
- run the non-grouped madevent color sum on the DDM basis too
  
  oliviermattelaer
  and
  claude
  committed
  00c4033
- drop the colour reflection folding
  
  oliviermattelaer
  and
  claude
  committed
  9f8b1b3
- Merge branch 'claude/nogroup-madevent-ddm' into claude/dixon-maltoni-gluon-basis-69e1d7
  oliviermattelaer
  committed
  63b8683
- matchbox: make the fortran export produce code that compiles again
  
  oliviermattelaer
  and
  claude
  committed
  0604ba1
- matchbox: thread the flavor index through the split-orders template
  
  oliviermattelaer
  and
  claude
  committed
  09457ba
Commits on Aug 14, 2026
- update IOTest
  oliviermattelaer
  committed
  6ad2d5a
Commits on Aug 17, 2026
- test_config: list the color_basis set-option
  
  oliviermattelaer
  and
  claude
  committed
  c292cfc
Commits on Aug 20, 2026
- merge with main
  oliviermattelaer
  committed
  35c87a6
- Merge branch 'main' into claude/dixon-maltoni-gluon-basis-69e1d7
  oliviermattelaer
  authored
  6f9617f
Commits on Aug 21, 2026
- fix acceptance test
  oliviermattelaer
  committed
  3cdccff
- Merge branch 'main' into claude/dixon-maltoni-gluon-basis-69e1d7
  oliviermattelaer
  committed
  86f17c2
Commits on Sep 8, 2026
- Merge remote-tracking branch 'origin/main' into claude/dixon-maltoni-gluon-basis-69e1d7
  oliviermattelaer
  committed
  cc0c510
Commits on Sep 10, 2026
- Merge remote-tracking branch 'origin/main' into claude/dixon-maltoni-gluon-basis-69e1d7
  oliviermattelaer
  committed
  e460445

Commits

Commits on Aug 5, 2026

Commits on Aug 6, 2026

Commits on Aug 7, 2026

Commits on Aug 9, 2026

Commits on Aug 11, 2026

Commits on Aug 12, 2026

Commits on Aug 14, 2026

Commits on Aug 17, 2026

Commits on Aug 20, 2026

Commits on Aug 21, 2026

Commits on Sep 8, 2026

Commits on Sep 10, 2026