Evidence row 2201592

What was observed

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  ],
  "name": "Algebra and Geometry Solvers",
  "owner_address": "0xb531320805c5bed1d46aeadcf4f008fdf172dbda",
  "raw": {
    "accepts": [
      {
        "amount": "20000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
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        "network": "eip155:8453",
        "payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
        "scheme": "exact"
      },
      {
        "amount": "20000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
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        "scheme": "exact"
      },
      {
        "amount": "20000",
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        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:137",
        "payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
        "scheme": "exact"
      },
      {
        "amount": "20000",
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        "extra": {
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        "network": "eip155:42161",
        "payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
        "scheme": "exact"
      }
    ],
    "description": "Solve linear equations Ax = b (up to 6 unknowns): unique, none or infinite solutions, with rank and determinant.",
    "extensions": {
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        "info": {
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            "queryParams": {
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            },
            "type": "http"
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          "output": {
            "example": {
              "asOf": "2026-10-11T08:51:18.857Z",
              "degraded": false,
              "determinant": -1,
              "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
              "equations": 3,
              "maxResidual": 0,
              "notChecked": [
                "ill-conditioning: a nearly singular system can give very inaccurate results (the determinant is reported so you can judge)",
                "exact rational answers (results are decimals)"
              ],
              "rankOfMatrix": 3,
              "reasons": [
                "Gauss-Jordan elimination with partial pivoting.",
                "Check: largest residual |Ax - b| = 0.00e+0."
              ],
              "solution": {
                "x1": 2,
                "x2": 3,
                "x3": -1
              },
              "solutionVector": [
                2,
                3
              ],
              "source": "computed locally",
              "summary": "x1 = 2, x2 = 3, x3 = -1.",
              "unknowns": 3,
              "verdict": "UNIQUE_SOLUTION"
            },
            "type": "json"
          }
        },
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    },
    "lastUpdated": "2026-11-01T23:37:23.89Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-11-01T23:37:23.711Z"
    },
    "resource": "https://math-geometry.x402tookit.com/linear-system",
    "serviceName": "Algebra and Geometry Solvers",
    "tags": [
      "algebra",
      "linear-system",
      "gauss",
      "matrix"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Solve linear equations Ax = b (up to 6 unknowns): unique, none or infinite solutions, with rank and determinant."
}

What the leaf hashes

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Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-11-02 (444186 rows).

1. 0x0d817ab4ec8b1b49044cfc4aaa48b68d7eab9d56af68d55dfb9d699f61cb2b84
2. 0xce060a02a3c483adcfa0015164a2d8a14cd4c761b3a3ed55255f0a12e5d7d6f0
3. 0x23cb431d7e243d14278cfdc984c9725e4e592d0c0befb1876383d1b630ca000e
4. 0xe4102539b65bd5d34a089b8f2beb30e911a56301acd8add0b029c1c3054db971
5. 0xb3c03cdca004e0a71df4834ca29807a2f53b822860eda387eb0a4255e4dc8ad0
6. 0x31b94a17bee55560efede81bbbde75c2bfd65ce2a8bc07813c5b9934bbd6692e
7. 0x41f74c80cec76d79e65b7d86c47804a7ec3812c8f9f72b3c152351468e88286b
8. 0xf09efc1459f420eb8ea8931e35d82bb975868d0f4348a61f07f98391978049b7
9. 0x6f96928bb859342411b200f0df5ce9c5d666a1905ca9018c32e8e02ebc18cb94
10. 0x5012643b3c2a818a9e6f48da9f72796741a1f5b3afa9cf3aea19b8830716a65e
11. 0x09e3051a8caa284b8f18098c94d8f7cd2b16291eed55d5b87c044fe951d43b36
12. 0x5ab1a0e263d75fe8c3b85060a6cca1c534560cbb1cc844fb2b62f0bce0628b74
13. 0x21862012011e9c7bd96b9da5758a45e44049f740c8ef1f280b01bc054552ce7e
14. 0xdd12fe6a2b0c972fe8b92369b1535a7d883c9e1085b61ddaf4130d8880afad75
15. 0xd82979c12a2aae44121bb6058b3364b3a3cbc9be411e35ab0208df5ed56f65d4
16. 0x7cb861d18f06406535ade133f716d897f27d257cf0121f99d94c78c713c4b54d
17. 0x53a741b69e9e51c4a288a74712aa6ac3fb28c8923cd3e6461d161c4f2d48b31a
18. 0x050f2978b537f7afb21ee1551577cdf146d1c56f4df12d24315ae5e69366b0a4
19. 0x365b161a4b68d750dcc4b3ecce1154a2163c87b08762079428e68f0ebb6a754e

Day root

0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1

Chained

0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2

Published

On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af