Pith Number

pith:NDAQEOCA

pith:2026:NDAQEOCAVZP6IPWMON27LQTSUE

not attested not anchored not stored refs pending

An FFT-based solver with general boundary conditions for stationary diffusion problems based on Chebyshev collocation

Javier Segurado, Juan M. Quecedo

arxiv:2606.21410 v1 · 2026-06-19 · math.NA · cond-mat.mtrl-sci · cs.NA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NDAQEOCAVZP6IPWMON27LQTSUE}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-06-23T01:13:09.385519Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

68c1023840ae5fe43ecc7375f5c272a1258ce181c1e15b28bc4ea423a82ab561

Aliases

arxiv: 2606.21410 · arxiv_version: 2606.21410v1 · doi: 10.48550/arxiv.2606.21410 · pith_short_12: NDAQEOCAVZP6 · pith_short_16: NDAQEOCAVZP6IPWM · pith_short_8: NDAQEOCA

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/NDAQEOCAVZP6IPWMON27LQTSUE \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 68c1023840ae5fe43ecc7375f5c272a1258ce181c1e15b28bc4ea423a82ab561

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ee72673929c707fe42f3e5c285c73d1f49c5e6cf943acff0d265e2ad8a526723",
    "cross_cats_sorted": [
      "cond-mat.mtrl-sci",
      "cs.NA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2026-06-19T13:22:45Z",
    "title_canon_sha256": "c1d3cc73f0174fc2cf1562505cd38e020c3da28a9271c6141d8d20db6359ffa4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.21410",
    "kind": "arxiv",
    "version": 1
  }
}