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For an arbitrary tx, it is often said that 6 confirmations is sufficient. However, maturity rule states that coinbase tx can’t be spent until it receives 101 confirmations. Why do we have this disperancy? Why 6 confirmations on coinbase transaction is not considered as sufficient for example ?Read more

Let $ \epsilon>0$ be given. Let $ Y$ be a compact, Hausdorff space and let $ U\subseteq Y$ be an open subset. Assume that $ (\mu_n)_{n\in\mathbb{N}}$ is a sequence of regular Borel probability measures on $ Y$ . I want to show the existence of a continuous function $ f$ , supported on $ U$Read more

What is the derivative for the following series $ $ \frac{\mathbf d}{\mathbf d n} \sum\limits_{k=1}^n f(n)g(k), \qquad n\text{ is integer}$ $Read more

Let $ X$ be a hyperkaehler manifold. Being hyperkaehler, it has three distinguished Kaehler forms, $ \omega^u$ ($ u$ =1,2,3), corresponding to its three distinguished almost complex structures. How does one describe a submanifold, $ S$ , of $ X$ which is ‘Lagrangian’ with respect to all three Kaehler forms, i.e., $ $ \omega^u(T_1,T_2)=0$ $Read more

Is there already an established name for properties or subgraphs of finite, symmetric graphs, that are invariant under a change of vertex weights? Some of those invariants are the extremal Hamilton cycles the relative order of the weights of perfect matchings in complete subgraphs with 4 vertices the relative order of the weights of detoursRead more