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Evidence row 2201661

Observed , by sync.x402_bazaar/1.

Kind
listing
About
source_record x402_bazaar:https://linear-algebra.x402tookit.com/determinant
Recorded
Previous row
None: the first of its kind about this subject
Body SHA-256
c30413a08f021aff245fb9423e0415417f04c881eb1d716831f146dc7be09596
Leaf
0x104c923d0b53aea7f6bcf1c3c385d53e476599d8c0d33b9241d1971624365283

What was observed

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    [
      "x402",
      "https://linear-algebra.x402tookit.com/determinant"
    ]
  ],
  "name": "Linear Algebra",
  "owner_address": "0xb531320805c5bed1d46aeadcf4f008fdf172dbda",
  "raw": {
    "accepts": [
      {
        "amount": "20000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
        "scheme": "exact"
      },
      {
        "amount": "20000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
          "transactionVersions": [
            0
          ]
        },
        "maxTimeoutSeconds": 300,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "DUPiupXtuox38dcGoXUKer5mAydCzmaHjrbQ66qeEm8s",
        "scheme": "exact"
      },
      {
        "amount": "20000",
        "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:137",
        "payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
        "scheme": "exact"
      },
      {
        "amount": "20000",
        "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:42161",
        "payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
        "scheme": "exact"
      }
    ],
    "description": "Determinant of a square matrix (up to 10x10) by LU with partial pivoting, flagging a numerically singular matrix.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "A": "[[6,1,1],[4,-2,5],[2,8,7]]"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "asOf": "2026-10-12T00:51:54.937Z",
              "degraded": false,
              "determinant": -306,
              "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
              "notChecked": [
                "exact arithmetic: a determinant near zero is judged against a stated tolerance, not proved zero",
                "overflow beyond double range (entries are capped at 1e15)"
              ],
              "reasons": [
                "LU decomposition with partial pivoting: the determinant is the product of the pivots times the sign of the row swaps.",
                "Smallest pivot is 6."
              ],
              "relativeToHadamardBound": 0.6841,
              "singular": false,
              "size": 3,
              "source": "computed locally",
              "summary": "The determinant of the 3x3 matrix is -306.",
              "verdict": "DETERMINANT_COMPUTED"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "A": {
                      "description": "Square matrix, JSON like [[1,2],[3,4]] or 1,2;3,4 (max 10x10)",
                      "type": "string"
                    }
                  },
                  "required": [
                    "A"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "asOf": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "degraded": {
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "determinant": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "disclaimer": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "notChecked": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "reasons": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "relativeToHadamardBound": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "singular": {
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "size": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "source": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "summary": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "verdict": {
                      "type": [
                        "null",
                        "string"
                      ]
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-11-01T23:33:56.341Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-11-01T23:33:56.07Z"
    },
    "resource": "https://linear-algebra.x402tookit.com/determinant",
    "serviceName": "Linear Algebra",
    "tags": [
      "determinant",
      "matrix",
      "singular",
      "linear-algebra"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Determinant of a square matrix (up to 10x10) by LU with partial pivoting, flagging a numerically singular matrix."
}

What the leaf hashes

{"body":"c30413a08f021aff245fb9423e0415417f04c881eb1d716831f146dc7be09596","id":2201661,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646807776146,"prev":null,"subject":"x402_bazaar:https://linear-algebra.x402tookit.com/determinant","subject_kind":"source_record"}

Proof

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

  1. 0x104c83fb025897aed0a0b534bbc4c59751d9af1600e8e2475b560c2624b4a94d
  2. 0x8d37bfc716de161dc66fb75daa2e0c1b7372e19e4e999f8e6031db3d0df25fa0
  3. 0xe630487e0579d610b9cbfbfe652fe88153c5654ae58d520144fef40534db1e07
  4. 0xf272f8adc914791ea19fb16f9d04b77e6e9f65861d77b60cfe3f3f8656b9cd61
  5. 0xd086595b24a6b461f31658ee018689be89b1deb2ffd0e9d73fba8d76f43f9f2a
  6. 0x26cc1f7b1cf2c2e2eaf6da2c4b2f9d4d7e1a3f43b7067259dd0bed60dd85e5fd
  7. 0x3ed89c0554a89bcdb3cb2c81586462077dd345ab1494024a76222d084f2c45f5
  8. 0x468e40116c18b4690ec3b8cea0c6f597393397c6b57fa2e2bec05bdd791a0b55
  9. 0x10f4f51d77c136c74f0156da856c3a1c5c64e18d0c89c8c53c0517d7f28bd25f
  10. 0xb2e01a7c5e8234c65832a081aa9b5be19a6e338dcd8c92f1897ae069595bc3e4
  11. 0x2d4712bd1203bc5244fa0599fa09618cba6739106dab26a3d111b0ec8558f41e
  12. 0x37c4ce84bc1fbced66397add5bebabce40461398a546a037487c5eeb7879648d
  13. 0xaed8243a14c659d2324c6748095467bfaec6927f1294091015e04180dda07dd7
  14. 0x9914dfe331775bd1714304f757d2b6b43ba45167245d645ce50f54a3d8617c4d
  15. 0xd82979c12a2aae44121bb6058b3364b3a3cbc9be411e35ab0208df5ed56f65d4
  16. 0x7cb861d18f06406535ade133f716d897f27d257cf0121f99d94c78c713c4b54d
  17. 0x53a741b69e9e51c4a288a74712aa6ac3fb28c8923cd3e6461d161c4f2d48b31a
  18. 0x050f2978b537f7afb21ee1551577cdf146d1c56f4df12d24315ae5e69366b0a4
  19. 0x365b161a4b68d750dcc4b3ecce1154a2163c87b08762079428e68f0ebb6a754e
Day root
0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
Chained
0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
Published
On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af

How to check it · This row as JSON