(G1( 0)) ---> empty 

(G( 0)) ---> 
[[(0,0),(0,0)]
 [(0,0),(0,0)]]

(Gv2( 0)) ---> 
[[(0,0)]]

(Gv2( 0)) ---> 
[[(10,0)]]

(G( 0)) ---> 
[[(10,0),(0,0)]
 [(0,0),(0,0)]]

(G(om_)) ---> gf_view(x0,)

(tql::eval(G(om_), om_=0)) ---> 
[[(10,0),(0,0)]
 [(0,0),(0,0)]]

(Gv(om_)) ---> gf_view(x0,)

(tql::eval(Gv(om_), om_=0)) ---> 
[[(10,0),(0,0)]
 [(0,0),(0,0)]]

-------------lazy assign ------------------
(G(0)) ---> 
[[(2.3,3.14159),(0,0)]
 [(0,0),(2.3,3.14159)]]

(G(inf)) --->  tail/tail_view : Ordermin/max = -1  3
 ...  Order -1 = 
[[(1,0),(0,0)]
 [(0,0),(1,0)]]
 ...  Order 0 = 
[[(2.3,0),(0,0)]
 [(0,0),(2.3,0)]]
 ...  Order 1 = 
[[(0,0),(0,0)]
 [(0,0),(0,0)]]
 ...  Order 2 = 
[[(0,0),(0,0)]
 [(0,0),(0,0)]]
 ...  Order 3 = 
[[(0,0),(0,0)]
 [(0,0),(0,0)]]

-------------lazy assign ------------------
(G(0)) ---> 
[[(0.151719,-0.207234),(0,0)]
 [(0,0),(0.151719,-0.207234)]]

(G(inf)) --->  tail/tail_view : Ordermin/max = -1  3
 ...  Order -1 = 
[[(1,0),(0,0)]
 [(0,0),(1,0)]]
 ...  Order 0 = 
[[(-2.3,0),(0,0)]
 [(0,0),(-2.3,0)]]
 ...  Order 1 = 
[[(5.29,0),(0,0)]
 [(0,0),(5.29,0)]]
 ...  Order 2 = 
[[(-12.167,0),(0,0)]
 [(0,0),(-12.167,0)]]
 ...  Order 3 = 
[[(27.9841,0),(0,0)]
 [(0,0),(27.9841,0)]]

(inverse(G(inf))) --->  tail_inv_lazy

-------------------------------------
(Gv(om_)) ---> gf_view(x0,)

(tql::eval(Gv(om_), om_=0)) ---> 
[[(0.151719,-0.207234),(0,0)]
 [(0,0),(0.151719,-0.207234)]]

(t.order_min()) ---> -1

(t( 0)) ---> 
[[(-2.3,0),(0,0)]
 [(0,0),(-2.3,0)]]

(Gv2(inf)( 0)) ---> 
[[(-2.3,0)]]

(G( 0)) ---> 
[[(0.151719,-0.207234),(0,0)]
 [(0,0),(0.151719,-0.207234)]]

(Gc( 0)) ---> 
[[(0.151719,-0.207234),(0,0)]
 [(0,0),(0.151719,-0.207234)]]

(G( 0)) ---> 
[[(0.151719,-0.207234),(0,0)]
 [(0,0),(0.151719,-0.207234)]]

(G(inf)(0)) ---> 
[[(-2.3,0),(0,0)]
 [(0,0),(-2.3,0)]]

(( G(inf) + G(inf) ) (0)) ---> (
[[(-2.3,0),(0,0)]
 [(0,0),(-2.3,0)]] + 
[[(-2.3,0),(0,0)]
 [(0,0),(-2.3,0)]])

(( G(inf) * G(inf) ) (0)) ---> 
[[(15.87,0),(0,0)]
 [(0,0),(15.87,0)]]

((G + Gc)( inf)) ---> ( tail/tail_view : Ordermin/max = -1  3
 ...  Order -1 = 
[[(1,0),(0,0)]
 [(0,0),(1,0)]]
 ...  Order 0 = 
[[(-2.3,0),(0,0)]
 [(0,0),(-2.3,0)]]
 ...  Order 1 = 
[[(5.29,0),(0,0)]
 [(0,0),(5.29,0)]]
 ...  Order 2 = 
[[(-12.167,0),(0,0)]
 [(0,0),(-12.167,0)]]
 ...  Order 3 = 
[[(27.9841,0),(0,0)]
 [(0,0),(27.9841,0)]] +  tail/tail_view : Ordermin/max = -1  3
 ...  Order -1 = 
[[(1,0),(0,0)]
 [(0,0),(1,0)]]
 ...  Order 0 = 
[[(-2.3,0),(0,0)]
 [(0,0),(-2.3,0)]]
 ...  Order 1 = 
[[(5.29,0),(0,0)]
 [(0,0),(5.29,0)]]
 ...  Order 2 = 
[[(-12.167,0),(0,0)]
 [(0,0),(-12.167,0)]]
 ...  Order 3 = 
[[(27.9841,0),(0,0)]
 [(0,0),(27.9841,0)]])

((t + 2.3)(0)) ---> (
[[(-2.3,0),(0,0)]
 [(0,0),(-2.3,0)]] + (2.3,0))

(t(-1)) ---> 
[[(1,0),(0,0)]
 [(0,0),(1,0)]]