SELECT t1.a, t1.b, t2.c, t3.d, t4.e
FROM t1
LEFT JOIN t2 ON (t1.b = t2.b)
LEFT JOIN t3 ON (t2.c = t3.c)
LEFT JOIN t4 ON (t2.c = t4.c)
ORDER BY t1.a
X_e:=\left\{n_e:=\left(n_1^e,\ldots,n_{K_e}^e\right)\in\stackrel[k\in K_e]{}{\times}\left\{0,\ldots,\left\lfloor\frac{c}{b_k^e}\right\rfloor\right\}: c_e(n_e)\le C\right\}
b(n_e):=\max_{k\in K_e: n_k^e>0}\left\{b_k^e\right\}
\stackrel[\lambda_e,b_e]{}{\mathbf M}
'import' => array (
...
'application.components.*'
);
ini_set('mbstring.func_overload', 0);