Pith Number

pith:ZHJTYOO2

pith:2019:ZHJTYOO2PUVW66R5WDJPRH7JP3

not attested not anchored not stored refs pending

Recovery of the Derivative of the Conductivity at the Boundary

Felipe Ponce-Vanegas

arxiv:1908.08427 v1 · 2019-08-22 · math.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZHJTYOO2PUVW66R5WDJPRH7JP3}

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	2026-07-05T02:20:52.809710Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c9d33c39da7d2b6f7a3db0d2f89fe97ecdd6b67037c1c43b88cd75ffc5498f3a

Aliases

arxiv: 1908.08427 · arxiv_version: 1908.08427v1 · doi: 10.48550/arxiv.1908.08427 · pith_short_12: ZHJTYOO2PUVW · pith_short_16: ZHJTYOO2PUVW66R5 · pith_short_8: ZHJTYOO2

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/ZHJTYOO2PUVW66R5WDJPRH7JP3 \
  | 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: c9d33c39da7d2b6f7a3db0d2f89fe97ecdd6b67037c1c43b88cd75ffc5498f3a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bfd652184fc8a14b27b21dd2c9bad04eb0d9ee8d4da9929d79aad76555eb137f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2019-08-22T15:02:50Z",
    "title_canon_sha256": "c9d3bc5cd977740273713b5777fbb10c9c76d3262c5fd736ae4d65f377227527"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.08427",
    "kind": "arxiv",
    "version": 1
  }
}