Pith Number

pith:MLHTH5I4

pith:2019:MLHTH5I4Q75CUYTCQNFAMNRYKQ

not attested not anchored not stored refs pending

The $RO(C_2)$-graded cohomology of $C_2$-surfaces in $\underline{\mathbb{Z}/2}$-coefficients

Christy Hazel

arxiv:1907.07280 v1 · 2019-07-16 · math.AT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MLHTH5I4Q75CUYTCQNFAMNRYKQ}

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	2026-05-17T23:40:22.826488Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

62cf33f51c87fa2a6262834a063638540159c805ca8409fa388450ee78a829fe

Aliases

arxiv: 1907.07280 · arxiv_version: 1907.07280v1 · doi: 10.48550/arxiv.1907.07280 · pith_short_12: MLHTH5I4Q75C · pith_short_16: MLHTH5I4Q75CUYTC · pith_short_8: MLHTH5I4

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/MLHTH5I4Q75CUYTCQNFAMNRYKQ \
  | 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: 62cf33f51c87fa2a6262834a063638540159c805ca8409fa388450ee78a829fe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bdeab19fe8174d7a168b6e7bf8b2bd92895626dc0cc1260fbe6321bfc47332b4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2019-07-16T22:24:33Z",
    "title_canon_sha256": "9a4888813bcb6f15fad0d3d7ecf24eb1f29354d56086ab62e49024ca35b3a97f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.07280",
    "kind": "arxiv",
    "version": 1
  }
}