$wget shakti.com/edu/k.zip;unzip k;make # linux/avx512

while if else .. select by from where .. in .. 
+-*%    &and |or <   >    =    ~ .     !   @     ?ind ^cut #take _drop , F'/\  ,A(.!~+-*%&|<>=@?) L(^#_)
+-*sqrt flip rev asc desc freq ~ value key first uniq sort count floor , f'/\  ,A(.!~+-*%_) L(&|^<>?=#@)
LMSA(min max sum avg..) ERZ(exp rms/log zig/zmx) rand rule grid          'map/reduce\scan

k-torch Rms(a*x%%1e-5+A*x) Zigmoid(a*x%1+E-x) Zoftmax(x%Sx:Ex-Mx) abc::.`
fwd(24M/14)[6 14 288 288] f::x+i@hwZgw:fRx+:e(lz,:dw)S6Z'(kz,:!cw)*6.9?!bw:aRx
gen(37M/18)[   32000 288] (@>a@bRcf/a@)\0
tcn(.6M/16)[13 50 192 64] a+0|b?d^0|c?d^x

mathematics from 4400BC
s:1'                    /sort         s rand 16                   uruk -4400 divide&impera
q:avg/1>abs             /quadrant     p grid 96                 thebes -3200 pi(abs log -1)
a:(+\|)\                /fibonacci    f 0 1       pingala       ujjain  -300
g:(!\|)/                /gcd          g 6 4       euclid    alexandria  -300
p::(+x*)/1 2 3          /polynomial   p rand 16   al-khwarizmi baghdad   820
r::(-x*)/1 3 5          /taylorseries q rand 16   madhava       kerala  1390 arc sincos
e::x log x%+/x          /entropy      e freq kj   napier       louvain  1572 ratio zeno
f:{(a+x),a-x:.x}/0'     /fft          f rand 16   gauss      brunswick  1805 divide&impera
w:(k log)w'             /wordle       w 2315      boltzmann       graz  1872 divide&impera
m::2>abs(x+*)/x         /mandelbrot   m grid 96   fatou&julia    paris  1915

rosetta            infix               prefix              post example(mode)
k       :()[;]{:}  +-*%!&|<>=~e@?#_^,  ~-*%_e&|^<>?=@,#!!. '/\  m:first desc freq
k/1992  :()[;]     +-*%!&|<>= ^@?#__,  ~-  _e+| <>?=*,#!   '/\  m::x i d?|/d:(1_i,#x)-i:!~='x@:<x
apl360  :()[;]     +-x%|^v<>=~* !|| ,  ~-  _*&| ||   ,#!    /\  m::x[i[d?|/d:(1_i,#x)-i:(~x=-1_-1,x)/!#x:x[<x]]]
python  =()[,]{:}  +-*/%&|<>DD^[w   a] ~-[sfetfsa uc] lrkv[len range keys values]
numpy.[where append][exp sqrt floor transpose reverse sort argsort unique collections.counter]