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CVP reproduce

mechanical.statics.cantilever_uniform_at_deflection

Independent re-run pack: fixed input vectors, O3 expected values, oracle version, commands, and the last result summary. This is how a reader moves from “CalculatorX says it passed” to “I can reproduce why it passed.”

Identity

Calculation version, protocol version, and evidence revision are distinct.

Calculation version
1.0.0
CVP protocol
1.0.0-proposed · proposed
Evidence revision
2026-09-27.o2-o3
Oracle
O3 · mpmath 1.4.1 · 80 dps
Generator
cantilever-uniform-at-mpmath-o3 · seed 20260927.cantilever-uniform-at-o3
Table SHA-256
f5878de7cbb708cb3202eea8fc1a66bcea26e8f67945175b4418aaad64b99aaa

Numerical claim

O3 PASS is a tabulated-vector claim, not a whole-domain proof.

O2: delta vs a separate-module identity (≤2 ULP). Not tip-only under the same uniform load, and not a simply supported span. ≤2 ULP vs O3 applies only to the published tabulated cantilever-uniform-at vectors.

  • Last O3 run 8 / 8
  • Max error observed 1 ULP
  • Threshold ≤ 2 ULP

Commands

Regenerate the table from the public generator. Independent REST check needs only this page's reproduce.json plus stdlib Python — no repo clone and no mpmath. The CVP runner remains a maintainer command.

Regenerate O3 table
python3 generate-cantilever-uniform-at-o3.py after downloading the public generator next to the table
Repo maintainer path
python3 scripts/lib/cvp/oracles/generate-cantilever-uniform-at-o3.py
Independent REST check
Compare POST /api/v1/calc/cantilever-uniform-at against /developers/cvp/reproduce/cantilever-uniform-at-o3-tables.json after downloading check-math-o3-rest.py next to cantilever-uniform-at-o3-tables.json (or pass --reproduce reproduce.json)
Re-run CVP
npm run cvp:run -- --capability mechanical.statics.cantilever_uniform_at_deflection
REST check
POST https://www.calculatorx.com/api/v1/calc/cantilever-uniform-at with a tabulated input from the table below

Re-running the generator without changing seed or inputs should reproduce table SHA-256 f5878de7cbb708cb3202eea8fc1a66bcea26e8f67945175b4418aaad64b99aaa. Compare each expected_f64 to the production result within the declared ULP threshold.

Tabulated vectors

Every O3 vector used for the ≤2 ULP claim. Expected values come from the published mpmath table, not from the implementation under test.

IDKindInputsExpected (f64)ActualULPStatus
o3-checkcheck{"w":"24","x":"2","L":"2","E":"1","I":"1"}{"oracle_layer":"analytic","delta":48,"w":24,"x":2,"L":2,"E":1,"I":1}{"model":"cantilever_uniform_at_deflection","w":24,"x":2,"L":2,"E":1,"I":1,"delta":48,"solver":"cantilever uniform load at a station","convention":"Cantilever fixed at one end with a uniform load over the whole length. Deflection at distance x from the fixed end is δ = w x² (6 L² − 4 L x + x²)/(24 E I). Positive w is the positive deflection direction. I is an input. x = L is the tip uniform-load page."}0PASS
o3-SISI{"w":"1000","x":"2","L":"2","E":"200000000000","I":"0.00001"}{"oracle_layer":"analytic","delta":0.001,"w":1000,"x":2,"L":2,"E":200000000000,"I":0.00001}{"model":"cantilever_uniform_at_deflection","w":1000,"x":2,"L":2,"E":200000000000,"I":0.00001,"delta":0.0009999999999999998,"solver":"cantilever uniform load at a station","convention":"Cantilever fixed at one end with a uniform load over the whole length. Deflection at distance x from the fixed end is δ = w x² (6 L² − 4 L x + x²)/(24 E I). Positive w is the positive deflection direction. I is an input. x = L is the tip uniform-load page."}1PASS
o3-aliasalias{"intensity":"48","span":"2","modulus":"1","Ix":"1","x":"2"}{"oracle_layer":"analytic","delta":96,"w":48,"x":2,"L":2,"E":1,"I":1}{"model":"cantilever_uniform_at_deflection","w":48,"x":2,"L":2,"E":1,"I":1,"delta":96,"solver":"cantilever uniform load at a station","convention":"Cantilever fixed at one end with a uniform load over the whole length. Deflection at distance x from the fixed end is δ = w x² (6 L² − 4 L x + x²)/(24 E I). Positive w is the positive deflection direction. I is an input. x = L is the tip uniform-load page."}0PASS
o3-awkwardawkward{"w":"13.7","x":"1.2","L":"2","E":"210000","I":"0.83"}{"oracle_layer":"analytic","delta":0.00007470154905335628,"w":13.7,"x":1.2,"L":2,"E":210000,"I":0.83}{"model":"cantilever_uniform_at_deflection","w":13.7,"x":1.2,"L":2,"E":210000,"I":0.83,"delta":0.00007470154905335628,"solver":"cantilever uniform load at a station","convention":"Cantilever fixed at one end with a uniform load over the whole length. Deflection at distance x from the fixed end is δ = w x² (6 L² − 4 L x + x²)/(24 E I). Positive w is the positive deflection direction. I is an input. x = L is the tip uniform-load page."}0PASS
o3-negsigned{"w":"-24","x":"2","L":"2","E":"1","I":"1"}{"oracle_layer":"analytic","delta":-48,"w":-24,"x":2,"L":2,"E":1,"I":1}{"model":"cantilever_uniform_at_deflection","w":-24,"x":2,"L":2,"E":1,"I":1,"delta":-48,"solver":"cantilever uniform load at a station","convention":"Cantilever fixed at one end with a uniform load over the whole length. Deflection at distance x from the fixed end is δ = w x² (6 L² − 4 L x + x²)/(24 E I). Positive w is the positive deflection direction. I is an input. x = L is the tip uniform-load page."}0PASS
o3-smallsmall{"w":"10","x":"0.5","L":"2","E":"1000","I":"0.01"}{"oracle_layer":"analytic","delta":0.2109375,"w":10,"x":0.5,"L":2,"E":1000,"I":0.01}{"model":"cantilever_uniform_at_deflection","w":10,"x":0.5,"L":2,"E":1000,"I":0.01,"delta":0.2109375,"solver":"cantilever uniform load at a station","convention":"Cantilever fixed at one end with a uniform load over the whole length. Deflection at distance x from the fixed end is δ = w x² (6 L² − 4 L x + x²)/(24 E I). Positive w is the positive deflection direction. I is an input. x = L is the tip uniform-load page."}0PASS
o3-stiffstiff{"w":"500","x":"1","L":"2","E":"210e9","I":"2e-4"}{"oracle_layer":"analytic","delta":0.000008432539682539682,"w":500,"x":1,"L":2,"E":210000000000,"I":0.0002}{"model":"cantilever_uniform_at_deflection","w":500,"x":1,"L":2,"E":210000000000,"I":0.0002,"delta":0.000008432539682539682,"solver":"cantilever uniform load at a station","convention":"Cantilever fixed at one end with a uniform load over the whole length. Deflection at distance x from the fixed end is δ = w x² (6 L² − 4 L x + x²)/(24 E I). Positive w is the positive deflection direction. I is an input. x = L is the tip uniform-load page."}0PASS
o3-longlong{"w":"200","x":"2","L":"4","E":"70e9","I":"5e-5"}{"oracle_layer":"analytic","delta":0.0006476190476190476,"w":200,"x":2,"L":4,"E":70000000000,"I":0.00005}{"model":"cantilever_uniform_at_deflection","w":200,"x":2,"L":4,"E":70000000000,"I":0.00005,"delta":0.0006476190476190476,"solver":"cantilever uniform load at a station","convention":"Cantilever fixed at one end with a uniform load over the whole length. Deflection at distance x from the fixed end is δ = w x² (6 L² − 4 L x + x²)/(24 E I). Positive w is the positive deflection direction. I is an input. x = L is the tip uniform-load page."}0PASS