The set
$$\mathbb{H}=\left\{\displaystyle\sum_{k=1}^n \dfrac{1}{k} \colon n \in \mathbb{Z}^+ \right\} = \left\{1,\frac{3}{2},\frac{11}{6},\frac{25}{12},\frac{137}{60},\frac{49}{20},\frac{
363}{140},\frac{761}{280},\ldots \right\}$$
of harmonic numbers is a time scale.
$\mathbb{T}=\mathbb{H}$
| Forward jump:
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$\sigma(t)=$
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derivation
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| Forward graininess:
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$\mu(t)=$
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derivation
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| Backward jump:
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$\rho(t)=$
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derivation
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| Backward graininess:
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$\nu(t)=$
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derivation
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| $\Delta$-derivative
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$f^{\Delta}(t)=$
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derivation
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| $\nabla$-derivative
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$f^{\nabla}(t)=$
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derivation
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| $\Delta$-integral
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$\displaystyle\int_s^t f(\tau) \Delta \tau=$
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derivation
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| $\nabla$-integral
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$\displaystyle\int_s^t f(\tau) \nabla \tau=$
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derivation
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| $h_k(t,s)$
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$h_k(t,s)=$
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derivation
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| $\hat{h}_k(t,s)$
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$\hat{h}_k(t,s)=$
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derivation
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| $g_k(t,s)$
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$g_k(t,s)=$
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derivation
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| $\hat{g}_k(t,s)$
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$\hat{g}_k(t,s)=$
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derivation
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| $e_p(t,s)$
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$e_p(t,s)=$
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derivation
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| $\hat{e}_p(t,s)$
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$\hat{e}_p(t,s)=$
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derivation
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| Gaussian bell
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$\mathbf{E}(t)=$
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derivation
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| $\mathrm{sin}_p(t,s)=$
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$\sin_p(t,s)=$
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derivation
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| $\mathrm{\sin}_1(t,s)$
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$\sin_1(t,s)=$
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derivation
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| $\widehat{\sin}_p(t,s)$
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$\widehat{\sin}_p(t,s)=$
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derivation
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| $\mathrm{\cos}_p(t,s)$
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$\cos_p(t,s)=$
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derivation
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| $\mathrm{\cos}_1(t,s)$
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$\cos_1(t,s)=$
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derivation
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| $\widehat{\cos}_p(t,s)$
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$\widehat{\cos}_p(t,s)=$
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derivation
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| $\sinh_p(t,s)$
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$\sinh_p(t,s)=$
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derivation
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| $\widehat{\sinh}_p(t,s)$
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$\widehat{\sinh}_p(t,s)=$
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derivation
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| $\cosh_p(t,s)$
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$\cosh_p(t,s)=$
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derivation
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| $\widehat{\cosh}_p(t,s)$
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$\widehat{\cosh}_p(t,s)=$
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derivation
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| Gamma function
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$\Gamma_{\mathbb{H}}(x,s)=$
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derivation
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| Euler-Cauchy logarithm
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$L(t,s)=$
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derivation
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| Bohner logarithm
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$L_p(t,s)=$
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derivation
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| Jackson logarithm
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$\log_{\mathbb{H}} g(t)=$
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derivation
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| Mozyrska-Torres logarithm
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$L_{\mathbb{H}}(t)=$
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derivation
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| Laplace transform
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$\mathscr{L}_{\mathbb{H}}\{f\}(z;s)=$
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derivation
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| Hilger circle
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derivation
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