diff --git a/Scattering and Shit.lyx b/Scattering and Shit.lyx
index 14ee495..1cdefc7 100644
--- a/Scattering and Shit.lyx	
+++ b/Scattering and Shit.lyx	
@@ -532,7 +532,7 @@ Definition [T](2.40);
 \begin_inset Formula 
 \begin{eqnarray*}
 \widetilde{\vect N}_{mn}^{(j)} & = & \frac{n(n+1)}{kr}\sqrt{\frac{2n+1}{4\pi}\frac{\left(n-m\right)!}{\left(n+m\right)!}}P_{n}^{m}\left(\cos\theta\right)e^{im\phi}z_{n}^{j}\left(kr\right)\hat{\vect r}\\
- &  & +\left[\tilde{\tau}_{mn}\left(\cos\theta\right)\hat{\vect{\theta}}+i\tilde{\pi}_{mn}\left(\cos\theta\right)\hat{\vect{\phi}}\right]e^{im\phi}z_{n}^{j}\left(kr\right)\\
+ &  & +\left[\tilde{\tau}_{mn}\left(\cos\theta\right)\hat{\vect{\theta}}+i\tilde{\pi}_{mn}\left(\cos\theta\right)\hat{\vect{\phi}}\right]e^{im\phi}\frac{1}{kr}\frac{\ud\left(kr\, z_{n}^{j}\left(kr\right)\right)}{\ud(kr)}\\
 \widetilde{\vect M}_{mn}^{(j)} & = & \left[i\tilde{\pi}_{mn}\left(\cos\theta\right)\hat{\vect{\theta}}-\tilde{\tau}_{mn}\left(\cos\theta\right)\hat{\vect{\phi}}\right]e^{im\phi}z_{n}^{j}\left(kr\right)
 \end{eqnarray*}
 
diff --git a/qpms/qpms_p.py b/qpms/qpms_p.py
index e5e511b..a7b8bc3 100644
--- a/qpms/qpms_p.py
+++ b/qpms/qpms_p.py
@@ -423,7 +423,7 @@ def Ã(m,n,μ,ν,kdlj,θlj,φlj,r_ge_d,J):
                 +math.lgamma(n+ν+1) - math.lgamma(2*(n+ν)+1))
     presum = math.exp(exponent)
     presum = presum * np.exp(1j*(μ-m)*φlj) * (-1)**m * 1j**(ν+n) / (4*n)
-    qmax = floor(q_max(-m,n,μ,ν)) #nemá tu být +m?
+    qmax = math.floor(q_max(-m,n,μ,ν)) #nemá tu být +m?
     q = np.arange(qmax+1, dtype=int)
     # N.B. -m !!!!!!
     a1q = a_q(-m,n,μ,ν) # there is redundant calc. of qmax
@@ -455,7 +455,7 @@ def B̃(m,n,μ,ν,kdlj,θlj,φlj,r_ge_d,J):
     presum = math.exp(exponent)
     presum = presum * np.exp(1j*(μ-m)*φlj) * (-1)**m * 1j**(ν+n+1) / (
         (4*n)*(n+1)*(n+m+1))
-    Qmax = floor(q_max(-m,n+1,μ,ν))
+    Qmax = math.floor(q_max(-m,n+1,μ,ν))
     q = np.arange(Qmax+1, dtype=int)
     if (μ == ν): # it would disappear in the sum because of the factor (ν-μ) anyway
         ã2q = 0